Use After Free Affecting kernel-debug package, versions <0:4.18.0-372.91.1.el8_6
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-6238586
- published 8 Feb 2024
- disclosed 18 Dec 2023
Introduced: 18 Dec 2023
CVE-2023-6817 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug to version 0:4.18.0-372.91.1.el8_6 or higher.
This issue was patched in RHSA-2024:0724.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug 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 netfilter: nf_tables component can be exploited to achieve local privilege escalation.
The function nft_pipapo_walk did not skip inactive elements during set walk which could lead double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free.
We recommend upgrading past commit 317eb9685095678f2c9f5a8189de698c5354316a.
References
- https://access.redhat.com/security/cve/CVE-2023-6817
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
- https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
- http://www.openwall.com/lists/oss-security/2023/12/22/6
- http://www.openwall.com/lists/oss-security/2023/12/22/13
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html