CVE-2026-80675libbpf: Reject non-exclusive metadata maps in the signed loader
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from fb2b0e290147ba01a53dfd92cf91058c9d2ee254 before b6862b6a25c6a925fb0b0e549ee4a52a8d2966fb; from fb2b0e290147ba01a53dfd92cf91058c9d2ee254 before 0dad5adeb34b6f78a883e8faa6a1c947a240e7c9; from fb2b0e290147ba01a53dfd92cf91058c9d2ee254 before 0fb6c9ed6493b4af01be8bb0a384574eba7df636 | CNA record |
References
- https://git.kernel.org/stable/c/b6862b6a25c6a925fb0b0e549ee4a52a8d2966fb
- https://git.kernel.org/stable/c/0dad5adeb34b6f78a883e8faa6a1c947a240e7c9
- https://git.kernel.org/stable/c/0fb6c9ed6493b4af01be8bb0a384574eba7df636
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.