7.1

CVE-2026-80675

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254
Version < b6862b6a25c6a925fb0b0e549ee4a52a8d2966fb
Status affected
Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254
Version < 0dad5adeb34b6f78a883e8faa6a1c947a240e7c9
Status affected
Version fb2b0e290147ba01a53dfd92cf91058c9d2ee254
Version < 0fb6c9ed6493b4af01be8bb0a384574eba7df636
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.18
Status affected
Version 0
Version < 6.18
Status unaffected
Version <= 6.18.*
Version 6.18.40
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.024
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/b6862b6a25c6a925fb0b0e549ee4a52a8d2966fb
https://git.kernel.org/stable/c/0dad5adeb34b6f78a883e8faa6a1c947a240e7c9
https://git.kernel.org/stable/c/0fb6c9ed6493b4af01be8bb0a384574eba7df636