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Oracle Linux: CVE-2023-52638: ELSA-2024-4583: kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2023-52638: ELSA-2024-4583:kernel security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
04/03/2024
Created
07/22/2024
Added
08/16/2024
Modified
01/07/2025

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] A vulnerability was found in the Linux kernel's Controller Area Network (CAN) protocol, within the J1939 protocol implementation. This issue occurs due to a potential deadlock caused by a race condition involving three locks: j1939_socks_lock, active_session_list_lock, and sk_session_queue_lock. This issue was identified in a Syzbot bug report.

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • https://attackerkb.com/topics/cve-2023-52638
  • CVE - 2023-52638
  • ELSA-2024-4583
  • 查看数 706
  • 已创建
  • 最后回复

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