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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free in btrfs_encoded_read_endio()\n\nShinichiro reported the following use-after free that sometimes is\nhappening in our CI system when running fstests\u0027 btrfs/284 on a TCMU\nrunner device:\n\n  BUG: KASAN: slab-use-after-free in lock_release+0x708/0x780\n  Read of size 8 at addr ffff888106a83f18 by task kworker/u80:6/219\n\n  CPU: 8 UID: 0 PID: 219 Comm: kworker/u80:6 Not tainted 6.12.0-rc6-kts+ #15\n  Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n  Workqueue: btrfs-endio btrfs_end_bio_work [btrfs]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x6e/0xa0\n   ? lock_release+0x708/0x780\n   print_report+0x174/0x505\n   ? lock_release+0x708/0x780\n   ? __virt_addr_valid+0x224/0x410\n   ? lock_release+0x708/0x780\n   kasan_report+0xda/0x1b0\n   ? lock_release+0x708/0x780\n   ? __wake_up+0x44/0x60\n   lock_release+0x708/0x780\n   ? __pfx_lock_release+0x10/0x10\n   ? __pfx_do_raw_spin_lock+0x10/0x10\n   ? lock_is_held_type+0x9a/0x110\n   _raw_spin_unlock_irqrestore+0x1f/0x60\n   __wake_up+0x44/0x60\n   btrfs_encoded_read_endio+0x14b/0x190 [btrfs]\n   btrfs_check_read_bio+0x8d9/0x1360 [btrfs]\n   ? lock_release+0x1b0/0x780\n   ? trace_lock_acquire+0x12f/0x1a0\n   ? __pfx_btrfs_check_read_bio+0x10/0x10 [btrfs]\n   ? process_one_work+0x7e3/0x1460\n   ? lock_acquire+0x31/0xc0\n   ? process_one_work+0x7e3/0x1460\n   process_one_work+0x85c/0x1460\n   ? __pfx_process_one_work+0x10/0x10\n   ? assign_work+0x16c/0x240\n   worker_thread+0x5e6/0xfc0\n   ? __pfx_worker_thread+0x10/0x10\n   kthread+0x2c3/0x3a0\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork+0x31/0x70\n   ? __pfx_kthread+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   \u003c/TASK\u003e\n\n  Allocated by task 3661:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   __kasan_kmalloc+0xaa/0xb0\n   btrfs_encoded_read_regular_fill_pages+0x16c/0x6d0 [btrfs]\n   send_extent_data+0xf0f/0x24a0 [btrfs]\n   process_extent+0x48a/0x1830 [btrfs]\n   changed_cb+0x178b/0x2ea0 [btrfs]\n   btrfs_ioctl_send+0x3bf9/0x5c20 [btrfs]\n   _btrfs_ioctl_send+0x117/0x330 [btrfs]\n   btrfs_ioctl+0x184a/0x60a0 [btrfs]\n   __x64_sys_ioctl+0x12e/0x1a0\n   do_syscall_64+0x95/0x180\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n  Freed by task 3661:\n   kasan_save_stack+0x30/0x50\n   kasan_save_track+0x14/0x30\n   kasan_save_free_info+0x3b/0x70\n   __kasan_slab_free+0x4f/0x70\n   kfree+0x143/0x490\n   btrfs_encoded_read_regular_fill_pages+0x531/0x6d0 [btrfs]\n   send_extent_data+0xf0f/0x24a0 [btrfs]\n   process_extent+0x48a/0x1830 [btrfs]\n   changed_cb+0x178b/0x2ea0 [btrfs]\n   btrfs_ioctl_send+0x3bf9/0x5c20 [btrfs]\n   _btrfs_ioctl_send+0x117/0x330 [btrfs]\n   btrfs_ioctl+0x184a/0x60a0 [btrfs]\n   __x64_sys_ioctl+0x12e/0x1a0\n   do_syscall_64+0x95/0x180\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n  The buggy address belongs to the object at ffff888106a83f00\n   which belongs to the cache kmalloc-rnd-07-96 of size 96\n  The buggy address is located 24 bytes inside of\n   freed 96-byte region [ffff888106a83f00, ffff888106a83f60)\n\n  The buggy address belongs to the physical page:\n  page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888106a83800 pfn:0x106a83\n  flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n  page_type: f5(slab)\n  raw: 0017ffffc0000000 ffff888100053680 ffffea0004917200 0000000000000004\n  raw: ffff888106a83800 0000000080200019 00000001f5000000 0000000000000000\n  page dumped because: kasan: bad access detected\n\n  Memory state around the buggy address:\n   ffff888106a83e00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n   ffff888106a83e80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n  \u003effff888106a83f00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n                              ^\n   ffff888106a83f80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n   ffff888106a84000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n  ==================================================================\n\nFurther analyzing the trace and \n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:55:14.844Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/05b36b04d74a517d6675bf2f90829ff1ac7e28dc"
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      "title": "btrfs: fix use-after-free in btrfs_encoded_read_endio()",
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        "engine": "bippy-1.2.0"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: Fix UAF on sco_sock_timeout\n\nconn-\u003esk maybe have been unlinked/freed while waiting for sco_conn_lock\nso this checks if the conn-\u003esk is still valid by checking if it part of\nsco_sk_list."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable path lives in the Bluetooth SCO stack and only executes when `conn-\u003ehcon` is non-NULL, i.e. an actual SCO/eSCO link exists with an in-range Bluetooth peer; `sco_conn_del()` (the second patched call site) is driven directly by `sco_connect_cfm`/`sco_disconn_cfm` from the adjacent device. Bluetooth radio proximity is required, matching the Adjacent classification.\nAC:L - The attacker controls both sides of the race: `SO_SNDTIMEO` sets `sk-\u003esk_sndtimeo`, which `sco_connect()` passes verbatim to `sco_sock_set_timer()`, so the timeout work can be scheduled to fire at an arbitrarily chosen moment and raced against `close()`, and `sco_sock_clear_timer()` uses non-sync `cancel_delayed_work()` so an in-flight work item is never waited for. syzbot produced a reproducer and confirmed the fix.\nPR:L - There is no `capable()` or `CAP_NET_*` check anywhere in `sco_sock_create/bind/listen/connect`, so any unprivileged local user can create SCO sockets and drive the connect/close sequence that frees the socket. Only basic local account access is needed, not root.\nUI:N - The whole sequence \u2014 socket creation, `SO_SNDTIMEO`, connect, close \u2014 is performed by the attacker\u0027s own process against a system Bluetooth adapter. No victim action is required.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - A use-after-free on `struct sock` lets the attacker respray the freed slab object and read back its contents through subsequent socket operations, giving a path to arbitrary kernel memory disclosure.\nI:H - The stale pointer is written through \u2014 `sock_hold()` performs an atomic increment on freed memory and `sk-\u003esk_err = ETIMEDOUT` writes into it \u2014 and `sk-\u003esk_state_change(sk)` performs an indirect call through a function pointer read from the freed object, providing a control-flow hijack primitive.\nA:H - Even without successful exploitation the UAF produces a KASAN splat / kernel oops or panic in `sco_sock_timeout()`, and it can be triggered repeatedly by an unprivileged process."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:27:45.098Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/678386459ffc07d2fbfbfe33456013786975cfef"
        },
        {
          "url": "https://git.kernel.org/stable/c/74a466a15731a754bcd8b5a83c126b5122e15a45"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ddda5d967e84796e7df1b54a55f36b4b9f21079"
        },
        {
          "url": "https://git.kernel.org/stable/c/d30803f6a972b5b9e26d1d43b583c7ec151de04b"
        },
        {
          "url": "https://git.kernel.org/stable/c/80b05fbfa998480fb3d5299d93eab946f51e9c36"
        },
        {
          "url": "https://git.kernel.org/stable/c/1bf4470a3939c678fb822073e9ea77a0560bc6bb"
        }
      ],
      "title": "Bluetooth: SCO: Fix UAF on sco_sock_timeout",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50125",
    "datePublished": "2024-11-05T17:10:53.090Z",
    "dateReserved": "2024-10-21T19:36:19.954Z",
    "dateUpdated": "2026-08-19T16:27:45.098Z",
    "state": "PUBLISHED"
  },
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        "metrics": [
          {
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              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49179",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T17:59:03.662860Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
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                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:02:29.552Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-cgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c4f5a678add58a8a0e7ee5e038496b376ea6d205",
              "status": "affected",
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            },
            {
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            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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            {
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            },
            {
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              "versionType": "git"
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          ]
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.189",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.110",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203]  dump_backtrace+0x0/0x310\n[ 2073.019206]  show_stack+0x28/0x38\n[ 2073.019210]  dump_stack+0xec/0x15c\n[ 2073.019216]  print_address_description+0x68/0x2d0\n[ 2073.019220]  kasan_report+0x238/0x2f0\n[ 2073.019224]  __asan_store8+0x88/0xb0\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252]  elevator_exit+0xc8/0xd0\n[ 2073.019256]  blk_exit_queue+0x50/0x88\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282]  el0_svc_common+0xc8/0x320\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\n[ 2073.019290]  el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\n[ 2073.019334]  elevator_switch+0x140/0x270\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342]  queue_attr_store+0x90/0xe0\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\n[ 2073.019359]  __vfs_write+0xe0/0x360\n[ 2073.019363]  vfs_write+0xf0/0x270\n[ 2073.019367]  ksys_write+0xdc/0x1b8\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\n[ 2073.019375]  el0_svc_common+0xc8/0x320\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\n[ 2073.019383]  el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\n[ 2073.019394]  kasan_slab_free+0x10/0x18\n[ 2073.019397]  kfree+0x94/0x368\n[ 2073.019400]  bfqg_put+0x64/0xb0\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408]  bfq_put_queue+0x220/0x228\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437]  elevator_exit+0xc8/0xd0\n[ 2073.019440]  blk_exit_queue+0x50/0x88\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467]  el0_svc_common+0xc8/0x320\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\n[ 2073.019474]  el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit."
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      "providerMetadata": {
        "dateUpdated": "2026-08-12T23:58:15.467Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205"
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        },
        {
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        {
          "url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
        }
      ],
      "title": "block, bfq: don\u0027t move oom_bfqq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49179",
    "datePublished": "2025-02-26T01:55:32.100Z",
    "dateReserved": "2025-02-26T01:49:39.281Z",
    "dateUpdated": "2026-08-12T23:58:15.467Z",
    "state": "PUBLISHED"
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              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
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              "content": {
                "id": "CVE-2024-56601",
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:50:40.940Z",
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          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
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          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          }
        ],
        "title": "CVE Program Container"
      }
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    "cna": {
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          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix slab-use-after-free Read in set_powered_sync\n\nThis fixes the following crash:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in set_powered_sync+0x3a/0xc0 net/bluetooth/mgmt.c:1353\nRead of size 8 at addr ffff888029b4dd18 by task kworker/u9:0/54\n\nCPU: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-01155-gf723224742fc #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\nWorkqueue: hci0 hci_cmd_sync_work\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\nq kasan_report+0x143/0x180 mm/kasan/report.c:601\n set_powered_sync+0x3a/0xc0 net/bluetooth/mgmt.c:1353\n hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:328\n process_one_work kernel/workqueue.c:3231 [inline]\n process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312\n worker_thread+0x86d/0xd10 kernel/workqueue.c:3389\n kthread+0x2f0/0x390 kernel/kthread.c:389\n ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n \u003c/TASK\u003e\n\nAllocated by task 5247:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n poison_kmalloc_redzone mm/kasan/common.c:370 [inline]\n __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387\n kasan_kmalloc include/linux/kasan.h:211 [inline]\n __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4193\n kmalloc_noprof include/linux/slab.h:681 [inline]\n kzalloc_noprof include/linux/slab.h:807 [inline]\n mgmt_pending_new+0x65/0x250 net/bluetooth/mgmt_util.c:269\n mgmt_pending_add+0x36/0x120 net/bluetooth/mgmt_util.c:296\n set_powered+0x3cd/0x5e0 net/bluetooth/mgmt.c:1394\n hci_mgmt_cmd+0xc47/0x11d0 net/bluetooth/hci_sock.c:1712\n hci_sock_sendmsg+0x7b8/0x11c0 net/bluetooth/hci_sock.c:1832\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x221/0x270 net/socket.c:745\n sock_write_iter+0x2dd/0x400 net/socket.c:1160\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xa72/0xc90 fs/read_write.c:590\n ksys_write+0x1a0/0x2c0 fs/read_write.c:643\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFreed by task 5246:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579\n poison_slab_object+0xe0/0x150 mm/kasan/common.c:240\n __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256\n kasan_slab_free include/linux/kasan.h:184 [inline]\n slab_free_hook mm/slub.c:2256 [inline]\n slab_free mm/slub.c:4477 [inline]\n kfree+0x149/0x360 mm/slub.c:4598\n settings_rsp+0x2bc/0x390 net/bluetooth/mgmt.c:1443\n mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259\n __mgmt_power_off+0x112/0x420 net/bluetooth/mgmt.c:9455\n hci_dev_close_sync+0x665/0x11a0 net/bluetooth/hci_sync.c:5191\n hci_dev_do_close net/bluetooth/hci_core.c:483 [inline]\n hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:508\n sock_do_ioctl+0x158/0x460 net/socket.c:1222\n sock_ioctl+0x629/0x8e0 net/socket.c:1341\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83gv\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
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      "metrics": [
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              "value": "AV:L - The vulnerability is reached entirely through local interfaces \u2014 a `write()` of an MGMT_OP_SET_POWERED command on an AF_BLUETOOTH HCI control socket racing a local `ioctl(HCIDEVDOWN)`; no over-the-air Bluetooth traffic is involved in either side of the race.\nAC:L - The attacker controls both sides of the race and can spin the pair (mgmt SET_POWERED write, HCIDEVDOWN ioctl) in a tight loop until the work item fires against the freed command, exactly as the syzbot reproducer does.\nPR:L - The path is gated on CAP_NET_ADMIN, which in real deployments is held by unprivileged network-facing service accounts (bluetoothd, Android\u0027s bluetooth UID) rather than by root, making this a service-privilege-to-kernel escalation; this matches the scoring of the structurally identical CVE-2024-58013 in the same file.\nUI:N - The attacker triggers both the command submission and the device-down teardown directly; no action by any other user or victim is needed.\nS:U - The use-after-free corrupts kernel slab memory and is exploited within the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - `set_powered_sync()` reads the `cmd-\u003eparam` pointer out of freed slab memory and dereferences it; if the reallocated object is attacker-sprayed this yields a controlled-address read, and the freed `cmd-\u003esk` is subsequently used to build a response, enabling kernel memory disclosure.\nI:H - Beyond the read, `mgmt_set_powered_complete()` calls `mgmt_pending_remove()` on the freed command, performing a `list_del()` unlink through attacker-controllable pointers \u2014 a classic arbitrary-write primitive leading to control-flow hijack.\nA:H - The slab use-after-free reliably faults in the `hci_cmd_sync_work` kworker (KASAN-confirmed by syzbot), producing a kernel oops/panic and taking down the Bluetooth workqueue and potentially the whole system."
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                },
                {
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                  "vulnerable": true
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: Fix use-after-free in get_info()\n\nip6table_nat module unload has refcnt warning for UAF. call trace is:\n\nWARNING: CPU: 1 PID: 379 at kernel/module/main.c:853 module_put+0x6f/0x80\nModules linked in: ip6table_nat(-)\nCPU: 1 UID: 0 PID: 379 Comm: ip6tables Not tainted 6.12.0-rc4-00047-gc2ee9f594da8-dirty #205\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:module_put+0x6f/0x80\nCall Trace:\n \u003cTASK\u003e\n get_info+0x128/0x180\n do_ip6t_get_ctl+0x6a/0x430\n nf_getsockopt+0x46/0x80\n ipv6_getsockopt+0xb9/0x100\n rawv6_getsockopt+0x42/0x190\n do_sock_getsockopt+0xaa/0x180\n __sys_getsockopt+0x70/0xc0\n __x64_sys_getsockopt+0x20/0x30\n do_syscall_64+0xa2/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nConcurrent execution of module unload and get_info() trigered the warning.\nThe root cause is as follows:\n\ncpu0\t\t\t\t      cpu1\nmodule_exit\n//mod-\u003estate = MODULE_STATE_GOING\n  ip6table_nat_exit\n    xt_unregister_template\n\tkfree(t)\n\t//removed from templ_list\n\t\t\t\t      getinfo()\n\t\t\t\t\t  t = xt_find_table_lock\n\t\t\t\t\t\tlist_for_each_entry(tmpl, \u0026xt_templates[af]...)\n\t\t\t\t\t\t\tif (strcmp(tmpl-\u003ename, name))\n\t\t\t\t\t\t\t\tcontinue;  //table not found\n\t\t\t\t\t\t\ttry_module_get\n\t\t\t\t\t\tlist_for_each_entry(t, \u0026xt_net-\u003etables[af]...)\n\t\t\t\t\t\t\treturn t;  //not get refcnt\n\t\t\t\t\t  module_put(t-\u003eme) //uaf\n    unregister_pernet_subsys\n    //remove table from xt_net list\n\nWhile xt_table module was going away and has been removed from\nxt_templates list, we couldnt get refcnt of xt_table-\u003eme. Check\nmodule in xt_net-\u003etables list re-traversal to fix it."
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              "value": "AV:L - The vulnerable path is entered from a local `getsockopt(IP6T_SO_GET_INFO)`/`setsockopt` syscall via `rawv6_getsockopt` \u2192 `nf_getsockopt` \u2192 `do_ip6t_get_ctl` \u2192 `get_info`, and the racing side is a local `delete_module`. No received packet or remote peer data reaches `xt_find_table_lock()`.\nAC:H - The buggy return is only reachable while the table\u0027s module is in `MODULE_STATE_GOING` and its template has already been unregistered \u2014 i.e. inside the window between `xt_unregister_template()` and `unregister_pernet_subsys()` in the module\u0027s exit path. The attacker can spin `getsockopt` to make the collision near-certain once teardown starts, but cannot initiate the unload, so a system state outside their control must coincide.\nPR:L - `do_ip6t_get_ctl()` gates only on `ns_capable(sock_net(sk)-\u003euser_ns, CAP_NET_ADMIN)`, which any unprivileged user obtains with `unshare -Urn`; the same call also drives `table_init()` to register the table in the attacker\u0027s own netns, so no real root is needed for the attacker-controlled half.\nUI:N - The attacker issues the socket option calls itself and no victim has to open a file, mount anything, or interact with attacker content; the module-unload precondition is accounted for under Attack Complexity.\nS:U - The unreferenced table, the freed slab object, and the corrupted module refcount all live inside the kernel\u0027s own security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - After `xt_table_unlock()` drops the mutex the `xt_table` is `kfree()`d by the concurrent `xt_unregister_table()`, so `module_put(t-\u003eme)` reads a pointer out of freed slab memory; per use-after-free scoring, control of the reallocated object\u0027s contents makes that pointer attacker-influenced and yields a kernel-memory read primitive.\nI:H - `module_put()` performs `atomic_dec_if_positive()` through the stale `t-\u003eme`, a write into freed memory \u2014 either the vfree\u0027d `struct module` or, with heap spraying of the freed `xt_table`, an attacker-chosen address, giving a decrement primitive leverageable toward kernel memory corruption and premature unload of an in-use module.\nA:H - The reported symptom is a `WARN_ON` refcount-underflow splat in `module_put()`, which is a full panic on the many fleets running `panic_on_warn=1`, and dereferencing the freed table pointer readily oopses or trips KASAN."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: Disallow replacing of child qdisc from one parent to another\n\nLion Ackermann was able to create a UAF which can be abused for privilege\nescalation with the following script\n\nStep 1. create root qdisc\ntc qdisc add dev lo root handle 1:0 drr\n\nstep2. a class for packet aggregation do demonstrate uaf\ntc class add dev lo classid 1:1 drr\n\nstep3. a class for nesting\ntc class add dev lo classid 1:2 drr\n\nstep4. a class to graft qdisc to\ntc class add dev lo classid 1:3 drr\n\nstep5.\ntc qdisc add dev lo parent 1:1 handle 2:0 plug limit 1024\n\nstep6.\ntc qdisc add dev lo parent 1:2 handle 3:0 drr\n\nstep7.\ntc class add dev lo classid 3:1 drr\n\nstep 8.\ntc qdisc add dev lo parent 3:1 handle 4:0 pfifo\n\nstep 9. Display the class/qdisc layout\n\ntc class ls dev lo\n class drr 1:1 root leaf 2: quantum 64Kb\n class drr 1:2 root leaf 3: quantum 64Kb\n class drr 3:1 root leaf 4: quantum 64Kb\n\ntc qdisc ls\n qdisc drr 1: dev lo root refcnt 2\n qdisc plug 2: dev lo parent 1:1\n qdisc pfifo 4: dev lo parent 3:1 limit 1000p\n qdisc drr 3: dev lo parent 1:2\n\nstep10. trigger the bug \u003c=== prevented by this patch\ntc qdisc replace dev lo parent 1:3 handle 4:0\n\nstep 11. Redisplay again the qdiscs/classes\n\ntc class ls dev lo\n class drr 1:1 root leaf 2: quantum 64Kb\n class drr 1:2 root leaf 3: quantum 64Kb\n class drr 1:3 root leaf 4: quantum 64Kb\n class drr 3:1 root leaf 4: quantum 64Kb\n\ntc qdisc ls\n qdisc drr 1: dev lo root refcnt 2\n qdisc plug 2: dev lo parent 1:1\n qdisc pfifo 4: dev lo parent 3:1 refcnt 2 limit 1000p\n qdisc drr 3: dev lo parent 1:2\n\nObserve that a) parent for 4:0 does not change despite the replace request.\nThere can only be one parent.  b) refcount has gone up by two for 4:0 and\nc) both class 1:3 and 3:1 are pointing to it.\n\nStep 12.  send one packet to plug\necho \"\" | socat -u STDIN UDP4-DATAGRAM:127.0.0.1:8888,priority=$((0x10001))\nstep13.  send one packet to the grafted fifo\necho \"\" | socat -u STDIN UDP4-DATAGRAM:127.0.0.1:8888,priority=$((0x10003))\n\nstep14. lets trigger the uaf\ntc class delete dev lo classid 1:3\ntc class delete dev lo classid 1:1\n\nThe semantics of \"replace\" is for a del/add _on the same node_ and not\na delete from one node(3:1) and add to another node (1:3) as in step10.\nWhile we could \"fix\" with a more complex approach there could be\nconsequences to expectations so the patch takes the preventive approach of\n\"disallow such config\".\n\nJoint work with Lion Ackermann \u003cnnamrec@gmail.com\u003e"
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