CVE-2026-31499

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 22 Apr 2026, 13:54
Last modified:23 May 2026, 16:05

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.09% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Apr 2026, 13:54
Published
Vulnerability first disclosed
23 May 2026, 16:05
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.09%• Percentile: 1%

Techniques & Countermeasures

  • CWE-667•Improper Locking

    The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Affected Systems

  • linux•linux

    f87271d21dd4ee83857ca11b94e7b4952749bbae | ≥ f87271d21dd4ee83857ca11b94e7b4952749bbae, < f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da | ≥ ab4eedb790cae44313759b50fe47da285e2519d5, < 3f26ecbd9cde621dd94be7ef252c7210b965a5c7 | ≥ ab4eedb790cae44313759b50fe47da285e2519d5, < d008460de352e534f6721de829b093368564ec66 | ≥ ab4eedb790cae44313759b50fe47da285e2519d5, < 00fdebbbc557a2fc21321ff2eaa22fd70c078608 | efc30877bd4bc85fefe98d80af60fafc86e5775e | 18ab6b6078fa8191ca30a3065d57bf35d5635761 | ≥ 6.12.20, < 6.12.88 | ≥ 6.6.84, < 6.7 | ≥ 6.13.8, < 6.14 | 6.14

  • linux•linux kernel

    ≥ 6.6.84, < 6.7 | ≥ 6.12.20, < 6.13 | ≥ 6.13.8, < 6.14 | ≥ 6.14.1, < 6.18.21 | ≥ 6.19, < 6.19.11 | 6.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7

References (4)