CVE-2024-50255 (GCVE-0-2024-50255)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:15 – Updated: 2025-11-03 22:27
VLAI?
Title
Bluetooth: hci: fix null-ptr-deref in hci_read_supported_codecs
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
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: abfeea476c68afea54c9c050a2d3b19d5d2ee873 , < 5d9054b9f769a8e124c4fa02072437c864726baf (git)
Affected: abfeea476c68afea54c9c050a2d3b19d5d2ee873 , < 1f1764466c33a4466363b821a25cd65c46a5a793 (git)
Affected: abfeea476c68afea54c9c050a2d3b19d5d2ee873 , < 48d7c24b7ef6417c68f206566364db1f8087bb23 (git)
Affected: abfeea476c68afea54c9c050a2d3b19d5d2ee873 , < 1e67d8641813f1876a42eeb4f532487b8a7fb0a8 (git)
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    Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.116 , ≤ 6.1.* (semver)
Unaffected: 6.6.60 , ≤ 6.6.* (semver)
Unaffected: 6.11.7 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.116\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.60\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.7\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"5.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:50:00.964Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50255\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:27:34.687Z\", \"dateReserved\": \"2024-10-21T19:36:19.980Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-09T10:15:08.658Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.