CVE-2023-52638

Advisory lineage Upstream: 0 Downstream: 17
Analyzed
Published: 03 Apr 2024, 14:54
Last modified:11 May 2026, 19:30

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Apr 2024, 14:54
Published
Vulnerability first disclosed
11 May 2026, 19:30
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock The following 3 locks would race against each other, causing the deadlock situation in the Syzbot bug report: - j1939_socks_lock - active_session_list_lock - sk_session_queue_lock A reasonable fix is to change j1939_socks_lock to an rwlock, since in the rare situations where a write lock is required for the linked list that j1939_socks_lock is protecting, the code does not attempt to acquire any more locks. This would break the circular lock dependency, where, for example, the current thread already locks j1939_socks_lock and attempts to acquire sk_session_queue_lock, and at the same time, another thread attempts to acquire j1939_socks_lock while holding sk_session_queue_lock. NOTE: This patch along does not fix the unregister_netdevice bug reported by Syzbot; instead, it solves a deadlock situation to prepare for one or more further patches to actually fix the Syzbot bug, which appears to be a reference counting problem within the j1939 codebase. [mkl: remove unrelated newline change]

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: 0.02%• Percentile: 5%

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

    ≥ 5b9272e93f2efe3f6cda60cc2c26817b2ce49386, < 03358aba991668d3bb2c65b3c82aa32c36851170 | ≥ 5b9272e93f2efe3f6cda60cc2c26817b2ce49386, < aedda066d717a0b4335d7e0a00b2e3a61e40afcf | ≥ 5b9272e93f2efe3f6cda60cc2c26817b2ce49386, < 26dfe112ec2e95fe0099681f6aec33da13c2dd8e | ≥ 5b9272e93f2efe3f6cda60cc2c26817b2ce49386, < 559b6322f9480bff68cfa98d108991e945a4f284 | ≥ 5b9272e93f2efe3f6cda60cc2c26817b2ce49386, < 6cdedc18ba7b9dacc36466e27e3267d201948c8d | 5.15

  • linux•linux_kernel

    < 5.15.149 | ≥ 5.16, < 6.1.79 | ≥ 6.2, < 6.6.18 | ≥ 6.7, < 6.7.6 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4

References (5)