6.5

CVE-2024-26886: Bluetooth: af_bluetooth: Fix deadlock

Modified
AliasesUBUNTU-CVE-2024-26886DEBIAN-CVE-2024-26886
Published 17-04-2024Last modified 30-10-2026

Vulnerability summary

CVE-2024-26886 is a medium (CVSS 6.5) Use After Free vulnerability in linux. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 42.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 26
RHSA-2024:6567RHSA-2024:6744RHSA-2024:6745SUSE-SU-2024:4367-1SUSE-SU-2025:0035-1SUSE-SU-2025:0201-1

Timeline

  1. 17-04-2024
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

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>

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.49% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu115 products
  • linux< 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-192.212 | < 5.15.0-117.127 | < 6.8.0-35.35
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1130.140 | < 5.15.0-1066.72 | < 6.8.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 2b16d960c79abc397f102c3d23d30005b68cb036, < 60673f442984fe689d4127a5dd4be414247b3d67 | ≥ 37f71e2c9f515834841826f4eb68ec33cfb2a1ff, < 0309acebc4b3884bfda332558bb8a1df052f4f39 | ≥ 1d576c3a5af850bf11fbd103f9ba11aa6d6061fb, < 64be3c6154886200708da0dfe259705fb992416c | ≥ 2e07e8348ea454615e268222ae3fc240421be768, < 817e8138ce86001b2fa5c63d6ede756e205a01f7 | ≥ 2e07e8348ea454615e268222ae3fc240421be768, < 2c9e2df022ef8b9d7fac58a04a2ef4ed25288955 | ≥ 2e07e8348ea454615e268222ae3fc240421be768, < f7b94bdc1ec107c92262716b073b3e816d4784fb | db1b14eec8c61a20374de9f9c2ddc6c9406a8c42 | ≥ 5.15.146, < 5.15.209 | ≥ 6.1.70, < 6.1.191 | ≥ 6.6.9, < 6.6.23 | ≥ 5.10.206, < 5.11 | 6.7
  • linux_kernel≥ 5.10.206, < 5.11 | ≥ 5.15.146, < 5.16 | ≥ 6.1.70, < 6.1.83 | ≥ 6.6.9, < 6.6.23 | ≥ 6.7, < 6.7.11 | ≥ 6.8, < 6.8.2
Debian1 product
  • linux< 6.1.85-1 | < 6.7.12-1

3 vendors · 118 products

References

32 links
Show all 32 references