CVE-2024-26886 (GCVE-0-2024-26886)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2026-06-01 16:04
VLAI
Title
Bluetooth: af_bluetooth: Fix deadlock
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: af_bluetooth: Fix deadlock Attemting to do sock_lock on .recvmsg may cause a deadlock as shown bellow, so instead of using sock_sock this uses sk_receive_queue.lock on bt_sock_ioctl to avoid the UAF: INFO: task kworker/u9:1:121 blocked for more than 30 seconds. Not tainted 6.7.6-lemon #183 Workqueue: hci0 hci_rx_work Call Trace: <TASK> __schedule+0x37d/0xa00 schedule+0x32/0xe0 __lock_sock+0x68/0xa0 ? __pfx_autoremove_wake_function+0x10/0x10 lock_sock_nested+0x43/0x50 l2cap_sock_recv_cb+0x21/0xa0 l2cap_recv_frame+0x55b/0x30a0 ? psi_task_switch+0xeb/0x270 ? finish_task_switch.isra.0+0x93/0x2a0 hci_rx_work+0x33a/0x3f0 process_one_work+0x13a/0x2f0 worker_thread+0x2f0/0x410 ? __pfx_worker_thread+0x10/0x10 kthread+0xe0/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>
Severity
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-17 17:41 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2b16d960c79abc397f102c3d23d30005b68cb036 , < 60673f442984fe689d4127a5dd4be414247b3d67 (git)
Affected: 1d576c3a5af850bf11fbd103f9ba11aa6d6061fb , < 64be3c6154886200708da0dfe259705fb992416c (git)
Affected: 2e07e8348ea454615e268222ae3fc240421be768 , < 817e8138ce86001b2fa5c63d6ede756e205a01f7 (git)
Affected: 2e07e8348ea454615e268222ae3fc240421be768 , < 2c9e2df022ef8b9d7fac58a04a2ef4ed25288955 (git)
Affected: 2e07e8348ea454615e268222ae3fc240421be768 , < f7b94bdc1ec107c92262716b073b3e816d4784fb (git)
Affected: db1b14eec8c61a20374de9f9c2ddc6c9406a8c42 (git)
Affected: 37f71e2c9f515834841826f4eb68ec33cfb2a1ff (git)
Affected: 5.15.146 , < 5.15.209 (semver)
Affected: 6.6.9 , < 6.6.23 (semver)
Affected: 5.10.206 , < 5.11 (semver)
Affected: 6.1.70 , < 6.2 (semver)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-26886.json",
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                      "versionEndExcluding": "6.9",
                      "versionStartIncluding": "6.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "5.10.206",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "6.1.70",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: af_bluetooth: Fix deadlock\n\nAttemting to do sock_lock on .recvmsg may cause a deadlock as shown\nbellow, so instead of using sock_sock this uses sk_receive_queue.lock\non bt_sock_ioctl to avoid the UAF:\n\nINFO: task kworker/u9:1:121 blocked for more than 30 seconds.\n      Not tainted 6.7.6-lemon #183\nWorkqueue: hci0 hci_rx_work\nCall Trace:\n \u003cTASK\u003e\n __schedule+0x37d/0xa00\n schedule+0x32/0xe0\n __lock_sock+0x68/0xa0\n ? __pfx_autoremove_wake_function+0x10/0x10\n lock_sock_nested+0x43/0x50\n l2cap_sock_recv_cb+0x21/0xa0\n l2cap_recv_frame+0x55b/0x30a0\n ? psi_task_switch+0xeb/0x270\n ? finish_task_switch.isra.0+0x93/0x2a0\n hci_rx_work+0x33a/0x3f0\n process_one_work+0x13a/0x2f0\n worker_thread+0x2f0/0x410\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xe0/0x110\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x2c/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \u003c/TASK\u003e"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-01T16:04:31.416Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/60673f442984fe689d4127a5dd4be414247b3d67"
            },
            {
              "url": "https://git.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416c"
            },
            {
              "url": "https://git.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7"
            },
            {
              "url": "https://git.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955"
            },
            {
              "url": "https://git.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fb"
            }
          ],
          "title": "Bluetooth: af_bluetooth: Fix deadlock",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-26886",
        "datePublished": "2024-04-17T10:27:40.941Z",
        "dateReserved": "2024-02-19T14:20:24.185Z",
        "dateUpdated": "2026-06-01T16:04:31.416Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.