CVE-2024-44959 (GCVE-0-2024-44959)
Vulnerability from cvelistv5
Published
2024-09-04 18:35
Modified
2026-05-23 15:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tracefs: Use generic inode RCU for synchronizing freeing With structure layout randomization enabled for 'struct inode' we need to avoid overlapping any of the RCU-used / initialized-only-once members, e.g. i_lru or i_sb_list to not corrupt related list traversals when making use of the rcu_head. For an unlucky structure layout of 'struct inode' we may end up with the following splat when running the ftrace selftests: [<...>] list_del corruption, ffff888103ee2cb0->next (tracefs_inode_cache+0x0/0x4e0 [slab object]) is NULL (prev is tracefs_inode_cache+0x78/0x4e0 [slab object]) [<...>] ------------[ cut here ]------------ [<...>] kernel BUG at lib/list_debug.c:54! [<...>] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [<...>] CPU: 3 PID: 2550 Comm: mount Tainted: G N 6.8.12-grsec+ #122 ed2f536ca62f28b087b90e3cc906a8d25b3ddc65 [<...>] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 [<...>] RIP: 0010:[<ffffffff84656018>] __list_del_entry_valid_or_report+0x138/0x3e0 [<...>] Code: 48 b8 99 fb 65 f2 ff ff ff ff e9 03 5c d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff e9 33 5a d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff <0f> 0b 4c 89 e9 48 89 ea 48 89 ee 48 c7 c7 60 8f dd 89 31 c0 e8 2f [<...>] RSP: 0018:fffffe80416afaf0 EFLAGS: 00010283 [<...>] RAX: 0000000000000098 RBX: ffff888103ee2cb0 RCX: 0000000000000000 [<...>] RDX: ffffffff84655fe8 RSI: ffffffff89dd8b60 RDI: 0000000000000001 [<...>] RBP: ffff888103ee2cb0 R08: 0000000000000001 R09: fffffbd0082d5f25 [<...>] R10: fffffe80416af92f R11: 0000000000000001 R12: fdf99c16731d9b6d [<...>] R13: 0000000000000000 R14: ffff88819ad4b8b8 R15: 0000000000000000 [<...>] RBX: tracefs_inode_cache+0x0/0x4e0 [slab object] [<...>] RDX: __list_del_entry_valid_or_report+0x108/0x3e0 [<...>] RSI: __func__.47+0x4340/0x4400 [<...>] RBP: tracefs_inode_cache+0x0/0x4e0 [slab object] [<...>] RSP: process kstack fffffe80416afaf0+0x7af0/0x8000 [mount 2550 2550] [<...>] R09: kasan shadow of process kstack fffffe80416af928+0x7928/0x8000 [mount 2550 2550] [<...>] R10: process kstack fffffe80416af92f+0x792f/0x8000 [mount 2550 2550] [<...>] R14: tracefs_inode_cache+0x78/0x4e0 [slab object] [<...>] FS: 00006dcb380c1840(0000) GS:ffff8881e0600000(0000) knlGS:0000000000000000 [<...>] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [<...>] CR2: 000076ab72b30e84 CR3: 000000000b088004 CR4: 0000000000360ef0 shadow CR4: 0000000000360ef0 [<...>] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [<...>] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [<...>] ASID: 0003 [<...>] Stack: [<...>] ffffffff818a2315 00000000f5c856ee ffffffff896f1840 ffff888103ee2cb0 [<...>] ffff88812b6b9750 0000000079d714b6 fffffbfff1e9280b ffffffff8f49405f [<...>] 0000000000000001 0000000000000000 ffff888104457280 ffffffff8248b392 [<...>] Call Trace: [<...>] <TASK> [<...>] [<ffffffff818a2315>] ? lock_release+0x175/0x380 fffffe80416afaf0 [<...>] [<ffffffff8248b392>] list_lru_del+0x152/0x740 fffffe80416afb48 [<...>] [<ffffffff8248ba93>] list_lru_del_obj+0x113/0x280 fffffe80416afb88 [<...>] [<ffffffff8940fd19>] ? _atomic_dec_and_lock+0x119/0x200 fffffe80416afb90 [<...>] [<ffffffff8295b244>] iput_final+0x1c4/0x9a0 fffffe80416afbb8 [<...>] [<ffffffff8293a52b>] dentry_unlink_inode+0x44b/0xaa0 fffffe80416afbf8 [<...>] [<ffffffff8293fefc>] __dentry_kill+0x23c/0xf00 fffffe80416afc40 [<...>] [<ffffffff8953a85f>] ? __this_cpu_preempt_check+0x1f/0xa0 fffffe80416afc48 [<...>] [<ffffffff82949ce5>] ? shrink_dentry_list+0x1c5/0x760 fffffe80416afc70 [<...>] [<ffffffff82949b71>] ? shrink_dentry_list+0x51/0x760 fffffe80416afc78 [<...>] [<ffffffff82949da8>] shrink_dentry_list+0x288/0x760 fffffe80416afc80 [<...>] [<ffffffff8294ae75>] shrink_dcache_sb+0x155/0x420 fffffe80416afcc8 [<...>] [<ffffffff8953a7c3>] ? debug_smp_processor_id+0x23/0xa0 fffffe80416afce0 [<...>] [<ffffffff8294ad20>] ? do_one_tre ---truncated---
References
Impacted products
Vendor Product Version
Linux Linux Version: 5f91fc82794d4a6e41cdcd02d00baa377d94ca78
Version: baa23a8d4360d981a49913841a726edede5cdd54
Version: baa23a8d4360d981a49913841a726edede5cdd54
Version: 414fb08628143203d29ccd0264b5a83fb9523c03
Version: 6.6.31   ≤
Version: 6.8.10   ≤
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-44959",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:39:53.968694Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:33:36.099Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/tracefs/inode.c",
            "fs/tracefs/internal.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "0b6743bd60a56a701070b89fb80c327a44b7b3e2",
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              "lessThan": "6.6.46",
              "status": "affected",
              "version": "6.6.31",
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/tracefs/inode.c",
            "fs/tracefs/internal.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.46",
                  "versionStartIncluding": "6.6.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10.5",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.8.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracefs: Use generic inode RCU for synchronizing freeing\n\nWith structure layout randomization enabled for \u0027struct inode\u0027 we need to\navoid overlapping any of the RCU-used / initialized-only-once members,\ne.g. i_lru or i_sb_list to not corrupt related list traversals when making\nuse of the rcu_head.\n\nFor an unlucky structure layout of \u0027struct inode\u0027 we may end up with the\nfollowing splat when running the ftrace selftests:\n\n[\u003c...\u003e] list_del corruption, ffff888103ee2cb0-\u003enext (tracefs_inode_cache+0x0/0x4e0 [slab object]) is NULL (prev is tracefs_inode_cache+0x78/0x4e0 [slab object])\n[\u003c...\u003e] ------------[ cut here ]------------\n[\u003c...\u003e] kernel BUG at lib/list_debug.c:54!\n[\u003c...\u003e] invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n[\u003c...\u003e] CPU: 3 PID: 2550 Comm: mount Tainted: G                 N  6.8.12-grsec+ #122 ed2f536ca62f28b087b90e3cc906a8d25b3ddc65\n[\u003c...\u003e] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\n[\u003c...\u003e] RIP: 0010:[\u003cffffffff84656018\u003e] __list_del_entry_valid_or_report+0x138/0x3e0\n[\u003c...\u003e] Code: 48 b8 99 fb 65 f2 ff ff ff ff e9 03 5c d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff e9 33 5a d9 fc cc 48 b8 99 fb 65 f2 ff ff ff ff \u003c0f\u003e 0b 4c 89 e9 48 89 ea 48 89 ee 48 c7 c7 60 8f dd 89 31 c0 e8 2f\n[\u003c...\u003e] RSP: 0018:fffffe80416afaf0 EFLAGS: 00010283\n[\u003c...\u003e] RAX: 0000000000000098 RBX: ffff888103ee2cb0 RCX: 0000000000000000\n[\u003c...\u003e] RDX: ffffffff84655fe8 RSI: ffffffff89dd8b60 RDI: 0000000000000001\n[\u003c...\u003e] RBP: ffff888103ee2cb0 R08: 0000000000000001 R09: fffffbd0082d5f25\n[\u003c...\u003e] R10: fffffe80416af92f R11: 0000000000000001 R12: fdf99c16731d9b6d\n[\u003c...\u003e] R13: 0000000000000000 R14: ffff88819ad4b8b8 R15: 0000000000000000\n[\u003c...\u003e] RBX: tracefs_inode_cache+0x0/0x4e0 [slab object]\n[\u003c...\u003e] RDX: __list_del_entry_valid_or_report+0x108/0x3e0\n[\u003c...\u003e] RSI: __func__.47+0x4340/0x4400\n[\u003c...\u003e] RBP: tracefs_inode_cache+0x0/0x4e0 [slab object]\n[\u003c...\u003e] RSP: process kstack fffffe80416afaf0+0x7af0/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R09: kasan shadow of process kstack fffffe80416af928+0x7928/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R10: process kstack fffffe80416af92f+0x792f/0x8000 [mount 2550 2550]\n[\u003c...\u003e] R14: tracefs_inode_cache+0x78/0x4e0 [slab object]\n[\u003c...\u003e] FS:  00006dcb380c1840(0000) GS:ffff8881e0600000(0000) knlGS:0000000000000000\n[\u003c...\u003e] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[\u003c...\u003e] CR2: 000076ab72b30e84 CR3: 000000000b088004 CR4: 0000000000360ef0 shadow CR4: 0000000000360ef0\n[\u003c...\u003e] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[\u003c...\u003e] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[\u003c...\u003e] ASID: 0003\n[\u003c...\u003e] Stack:\n[\u003c...\u003e]  ffffffff818a2315 00000000f5c856ee ffffffff896f1840 ffff888103ee2cb0\n[\u003c...\u003e]  ffff88812b6b9750 0000000079d714b6 fffffbfff1e9280b ffffffff8f49405f\n[\u003c...\u003e]  0000000000000001 0000000000000000 ffff888104457280 ffffffff8248b392\n[\u003c...\u003e] Call Trace:\n[\u003c...\u003e]  \u003cTASK\u003e\n[\u003c...\u003e]  [\u003cffffffff818a2315\u003e] ? lock_release+0x175/0x380 fffffe80416afaf0\n[\u003c...\u003e]  [\u003cffffffff8248b392\u003e] list_lru_del+0x152/0x740 fffffe80416afb48\n[\u003c...\u003e]  [\u003cffffffff8248ba93\u003e] list_lru_del_obj+0x113/0x280 fffffe80416afb88\n[\u003c...\u003e]  [\u003cffffffff8940fd19\u003e] ? _atomic_dec_and_lock+0x119/0x200 fffffe80416afb90\n[\u003c...\u003e]  [\u003cffffffff8295b244\u003e] iput_final+0x1c4/0x9a0 fffffe80416afbb8\n[\u003c...\u003e]  [\u003cffffffff8293a52b\u003e] dentry_unlink_inode+0x44b/0xaa0 fffffe80416afbf8\n[\u003c...\u003e]  [\u003cffffffff8293fefc\u003e] __dentry_kill+0x23c/0xf00 fffffe80416afc40\n[\u003c...\u003e]  [\u003cffffffff8953a85f\u003e] ? __this_cpu_preempt_check+0x1f/0xa0 fffffe80416afc48\n[\u003c...\u003e]  [\u003cffffffff82949ce5\u003e] ? shrink_dentry_list+0x1c5/0x760 fffffe80416afc70\n[\u003c...\u003e]  [\u003cffffffff82949b71\u003e] ? shrink_dentry_list+0x51/0x760 fffffe80416afc78\n[\u003c...\u003e]  [\u003cffffffff82949da8\u003e] shrink_dentry_list+0x288/0x760 fffffe80416afc80\n[\u003c...\u003e]  [\u003cffffffff8294ae75\u003e] shrink_dcache_sb+0x155/0x420 fffffe80416afcc8\n[\u003c...\u003e]  [\u003cffffffff8953a7c3\u003e] ? debug_smp_processor_id+0x23/0xa0 fffffe80416afce0\n[\u003c...\u003e]  [\u003cffffffff8294ad20\u003e] ? do_one_tre\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:53:14.532Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/726f4c241e17be75a9cf6870d80cd7479dc89e8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/061da60716ce0cde99f62f31937b81e1c03acef6"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b6743bd60a56a701070b89fb80c327a44b7b3e2"
        }
      ],
      "title": "tracefs: Use generic inode RCU for synchronizing freeing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-44959",
    "datePublished": "2024-09-04T18:35:57.464Z",
    "dateReserved": "2024-08-21T05:34:56.666Z",
    "dateUpdated": "2026-05-23T15:53:14.532Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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