CVE-2024-27050 Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRT-6802869
- published 2 May 2024
- disclosed 1 May 2024
Introduced: 1 May 2024
CVE-2024-27050 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
libbpf: Use OPTS_SET() macro in bpf_xdp_query()
When the feature_flags and xdp_zc_max_segs fields were added to the libbpf bpf_xdp_query_opts, the code writing them did not use the OPTS_SET() macro. This causes libbpf to write to those fields unconditionally, which means that programs compiled against an older version of libbpf (with a smaller size of the bpf_xdp_query_opts struct) will have its stack corrupted by libbpf writing out of bounds.
The patch adding the feature_flags field has an early bail out if the feature_flags field is not part of the opts struct (via the OPTS_HAS) macro, but the patch adding xdp_zc_max_segs does not. For consistency, this fix just changes the assignments to both fields to use the OPTS_SET() macro.
References
- https://access.redhat.com/security/cve/CVE-2024-27050
- https://git.kernel.org/stable/c/682ddd62abd4bdcee7584246903e7a2df005fe0d
- https://git.kernel.org/stable/c/92a871ab9fa59a74d013bc04f321026a057618e7
- https://git.kernel.org/stable/c/cd3be9843247edb8fc6fcd8d8237cbce2bc19f5e
- https://git.kernel.org/stable/c/fa5bef5e80c6a3321b2b1a7070436f3bc5daf07c