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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-05-01T12:54:35.555Z
Updated: 2024-08-02T00:21:05.913Z
Reserved: 2024-02-19T14:20:24.213Z
Link: CVE-2024-27050
Vulnrichment
Updated: 2024-05-16T18:25:15.576Z
NVD
Status : Awaiting Analysis
Published: 2024-05-01T13:15:50.070
Modified: 2024-07-03T01:50:17.020
Link: CVE-2024-27050
Redhat