Use After Free Affecting kernel-core package, versions <0:5.14.0-284.55.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-6316013
- published 29 Feb 2024
- disclosed 28 Aug 2023
Introduced: 28 Aug 2023
CVE-2023-4244 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.55.1.el9_2 or higher.
This issue was patched in RHSA-2024:1018.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 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.
Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.
We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.
References
- https://access.redhat.com/security/cve/CVE-2023-4244
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8
- https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html