CVE-2024-50255 (GCVE-0-2024-50255)
Vulnerability from cvelistv5
Published
2024-11-09 10:15
Modified
2026-05-11 20:48
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci: fix null-ptr-deref in hci_read_supported_codecs Fix __hci_cmd_sync_sk() to return not NULL for unknown opcodes. __hci_cmd_sync_sk() returns NULL if a command returns a status event. However, it also returns NULL where an opcode doesn't exist in the hci_cc table because hci_cmd_complete_evt() assumes status = skb->data[0] for unknown opcodes. This leads to null-ptr-deref in cmd_sync for HCI_OP_READ_LOCAL_CODECS as there is no hci_cc for HCI_OP_READ_LOCAL_CODECS, which always assumes status = skb->data[0]. KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 1 PID: 2000 Comm: kworker/u9:5 Not tainted 6.9.0-ga6bcb805883c-dirty #10 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: hci7 hci_power_on RIP: 0010:hci_read_supported_codecs+0xb9/0x870 net/bluetooth/hci_codec.c:138 Code: 08 48 89 ef e8 b8 c1 8f fd 48 8b 75 00 e9 96 00 00 00 49 89 c6 48 ba 00 00 00 00 00 fc ff df 4c 8d 60 70 4c 89 e3 48 c1 eb 03 <0f> b6 04 13 84 c0 0f 85 82 06 00 00 41 83 3c 24 02 77 0a e8 bf 78 RSP: 0018:ffff888120bafac8 EFLAGS: 00010212 RAX: 0000000000000000 RBX: 000000000000000e RCX: ffff8881173f0040 RDX: dffffc0000000000 RSI: ffffffffa58496c0 RDI: ffff88810b9ad1e4 RBP: ffff88810b9ac000 R08: ffffffffa77882a7 R09: 1ffffffff4ef1054 R10: dffffc0000000000 R11: fffffbfff4ef1055 R12: 0000000000000070 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810b9ac000 FS: 0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ddaa3439e CR3: 0000000139764003 CR4: 0000000000770ef0 PKRU: 55555554 Call Trace: <TASK> hci_read_local_codecs_sync net/bluetooth/hci_sync.c:4546 [inline] hci_init_stage_sync net/bluetooth/hci_sync.c:3441 [inline] hci_init4_sync net/bluetooth/hci_sync.c:4706 [inline] hci_init_sync net/bluetooth/hci_sync.c:4742 [inline] hci_dev_init_sync net/bluetooth/hci_sync.c:4912 [inline] hci_dev_open_sync+0x19a9/0x2d30 net/bluetooth/hci_sync.c:4994 hci_dev_do_open net/bluetooth/hci_core.c:483 [inline] hci_power_on+0x11e/0x560 net/bluetooth/hci_core.c:1015 process_one_work kernel/workqueue.c:3267 [inline] process_scheduled_works+0x8ef/0x14f0 kernel/workqueue.c:3348 worker_thread+0x91f/0xe50 kernel/workqueue.c:3429 kthread+0x2cb/0x360 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
References
Impacted products
Vendor Product Version
Linux Linux Version: abfeea476c68afea54c9c050a2d3b19d5d2ee873
Version: abfeea476c68afea54c9c050a2d3b19d5d2ee873
Version: abfeea476c68afea54c9c050a2d3b19d5d2ee873
Version: abfeea476c68afea54c9c050a2d3b19d5d2ee873
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{
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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci: fix null-ptr-deref in hci_read_supported_codecs\n\nFix __hci_cmd_sync_sk() to return not NULL for unknown opcodes.\n\n__hci_cmd_sync_sk() returns NULL if a command returns a status event.\nHowever, it also returns NULL where an opcode doesn\u0027t exist in the\nhci_cc table because hci_cmd_complete_evt() assumes status = skb-\u003edata[0]\nfor unknown opcodes.\nThis leads to null-ptr-deref in cmd_sync for HCI_OP_READ_LOCAL_CODECS as\nthere is no hci_cc for HCI_OP_READ_LOCAL_CODECS, which always assumes\nstatus = skb-\u003edata[0].\n\nKASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]\nCPU: 1 PID: 2000 Comm: kworker/u9:5 Not tainted 6.9.0-ga6bcb805883c-dirty #10\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: hci7 hci_power_on\nRIP: 0010:hci_read_supported_codecs+0xb9/0x870 net/bluetooth/hci_codec.c:138\nCode: 08 48 89 ef e8 b8 c1 8f fd 48 8b 75 00 e9 96 00 00 00 49 89 c6 48 ba 00 00 00 00 00 fc ff df 4c 8d 60 70 4c 89 e3 48 c1 eb 03 \u003c0f\u003e b6 04 13 84 c0 0f 85 82 06 00 00 41 83 3c 24 02 77 0a e8 bf 78\nRSP: 0018:ffff888120bafac8 EFLAGS: 00010212\nRAX: 0000000000000000 RBX: 000000000000000e RCX: ffff8881173f0040\nRDX: dffffc0000000000 RSI: ffffffffa58496c0 RDI: ffff88810b9ad1e4\nRBP: ffff88810b9ac000 R08: ffffffffa77882a7 R09: 1ffffffff4ef1054\nR10: dffffc0000000000 R11: fffffbfff4ef1055 R12: 0000000000000070\nR13: 0000000000000000 R14: 0000000000000000 R15: ffff88810b9ac000\nFS:  0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f6ddaa3439e CR3: 0000000139764003 CR4: 0000000000770ef0\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n hci_read_local_codecs_sync net/bluetooth/hci_sync.c:4546 [inline]\n hci_init_stage_sync net/bluetooth/hci_sync.c:3441 [inline]\n hci_init4_sync net/bluetooth/hci_sync.c:4706 [inline]\n hci_init_sync net/bluetooth/hci_sync.c:4742 [inline]\n hci_dev_init_sync net/bluetooth/hci_sync.c:4912 [inline]\n hci_dev_open_sync+0x19a9/0x2d30 net/bluetooth/hci_sync.c:4994\n hci_dev_do_open net/bluetooth/hci_core.c:483 [inline]\n hci_power_on+0x11e/0x560 net/bluetooth/hci_core.c:1015\n process_one_work kernel/workqueue.c:3267 [inline]\n process_scheduled_works+0x8ef/0x14f0 kernel/workqueue.c:3348\n worker_thread+0x91f/0xe50 kernel/workqueue.c:3429\n kthread+0x2cb/0x360 kernel/kthread.c:388\n ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244"
        }
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        "dateUpdated": "2026-05-11T20:48:34.942Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5d9054b9f769a8e124c4fa02072437c864726baf"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f1764466c33a4466363b821a25cd65c46a5a793"
        },
        {
          "url": "https://git.kernel.org/stable/c/48d7c24b7ef6417c68f206566364db1f8087bb23"
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        {
          "url": "https://git.kernel.org/stable/c/1e67d8641813f1876a42eeb4f532487b8a7fb0a8"
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      ],
      "title": "Bluetooth: hci: fix null-ptr-deref in hci_read_supported_codecs",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50255",
    "datePublished": "2024-11-09T10:15:08.658Z",
    "dateReserved": "2024-10-21T19:36:19.980Z",
    "dateUpdated": "2026-05-11T20:48:34.942Z",
    "state": "PUBLISHED"
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}


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