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-6316571
- published 29 Feb 2024
- disclosed 31 Jan 2024
Introduced: 31 Jan 2024
CVE-2024-1086 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.
The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT.
We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.
References
- https://access.redhat.com/security/cve/CVE-2024-1086
- https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660
- http://www.openwall.com/lists/oss-security/2024/04/10/22
- http://www.openwall.com/lists/oss-security/2024/04/10/23
- http://www.openwall.com/lists/oss-security/2024/04/14/1
- http://www.openwall.com/lists/oss-security/2024/04/15/2
- http://www.openwall.com/lists/oss-security/2024/04/17/5
- https://github.com/Notselwyn/CVE-2024-1086
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LSPIOMIJYTLZB6QKPQVVAYSUETUWKPF/
- https://news.ycombinator.com/item?id=39828424
- https://pwning.tech/nftables/
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://security.netapp.com/advisory/ntap-20240614-0009/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog