CVE-2026-80675 is a vulnerability in Linux Kernel
Published on August 28, 2026
libbpf: Reject non-exclusive metadata maps in the signed loader
In the Linux kernel, the following vulnerability has been resolved:
libbpf: Reject non-exclusive metadata maps in the signed loader
The loader verifies map->sha against the metadata hash in its
instructions. map->sha is calculated when BPF_OBJ_GET_INFO_BY_FD is
called on the frozen map.
While the map is frozen, the /signed loader/ must also ensure the map
is exclusive, as, without exclusivity (which a hostile host could just
omit when loading the loader), another BPF program with map access can
mutate the contents afterwards, so the check passes on stale data.
With the extra check as part of the signed loader, it now refuses to
move on with map->sha validation if the host set it up wrongly.
Products Associated with CVE-2026-80675
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254 and below b6862b6a25c6a925fb0b0e549ee4a52a8d2966fb is affected.
- Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254 and below 0dad5adeb34b6f78a883e8faa6a1c947a240e7c9 is affected.
- Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254 and below 0fb6c9ed6493b4af01be8bb0a384574eba7df636 is affected.
- Version 6.18 is affected.
- Before 6.18 is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.