Use After Free Affecting kernel-core package, versions <0:5.14.0-284.48.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-6195091
- published 26 Jan 2024
- disclosed 6 Sep 2023
Introduced: 6 Sep 2023
CVE-2023-3777 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.48.1.el9_2 or higher.
This issue was patched in RHSA-2024:0448.
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.
When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances.
We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.
References
- https://access.redhat.com/security/cve/CVE-2023-3777
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8
- https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8
- https://www.debian.org/security/2023/dsa-5492
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html