CVE-2023-52638 Affecting kernel-debug-uki-virt package, versions <0:5.14.0-427.26.1.el9_4
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Test your applications- Snyk ID SNYK-ORACLE9-KERNELDEBUGUKIVIRT-7546880
- published 20 Jul 2024
- disclosed 3 Apr 2024
Introduced: 3 Apr 2024
CVE-2023-52638 Open this link in a new tabHow to fix?
Upgrade Oracle:9
kernel-debug-uki-virt
to version 0:5.14.0-427.26.1.el9_4 or higher.
This issue was patched in ELSA-2024-4583
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-uki-virt
package and not the kernel-debug-uki-virt
package as distributed by Oracle
.
See How to fix?
for Oracle:9
relevant fixed versions and status.
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]
References
- https://linux.oracle.com/cve/CVE-2023-52638.html
- https://linux.oracle.com/errata/ELSA-2024-4583.html
- https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170
- https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e
- https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284
- https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d
- https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf