Use After Free Affecting kernel-debug-devel package, versions <0:4.18.0-193.120.1.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGDEVEL-6197294
- published 26 Jan 2024
- disclosed 6 Sep 2023
Introduced: 6 Sep 2023
CVE-2023-4622 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-devel to version 0:4.18.0-193.120.1.el8_2 or higher.
This issue was patched in RHSA-2024:0403.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel package and not the kernel-debug-devel package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation.
The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free.
We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.
References
- https://access.redhat.com/security/cve/CVE-2023-4622
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.1.y&id=790c2f9d15b594350ae9bca7b236f2b1859de02c
- https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c
- https://www.debian.org/security/2023/dsa-5492
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html