bpf: Reject exclusive maps for bpf_map_elem iterators

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74360
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:37 UTC
Updated2026-08-15 06:22:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Reject exclusive maps for bpf_map_elem iterators Exclusive maps (aka excl_prog_hash) are meant to be reachable only from the single program whose hash matches. This is enforced by check_map_prog_compatibility() when the map is referenced from a program such as signed BPF loaders. A bpf_map_elem iterator, however, binds its target map at attach time in bpf_iter_attach_map() instead of referencing it from the program, so the exclusivity check is never reached. On top of that, the iterator exposes the map value as a writable buffer.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected baefdbdf6812e120c9fba9cfb101d3656f478026 5cf2c85b1231218a3e3e9f188afb4fe2e17903d5 git Not specified
CNA Linux Linux affected baefdbdf6812e120c9fba9cfb101d3656f478026 c3da741d5b2119c61c4498bc936f0fc1dbc3c79b git Not specified
CNA Linux Linux affected baefdbdf6812e120c9fba9cfb101d3656f478026 3c56ee343f9412d81918635c3e25e22a5dd6d87e git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5cf2c85b1231218a3e3e9f188afb4fe2e17903d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3c56ee343f9412d81918635c3e25e22a5dd6d87e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c3da741d5b2119c61c4498bc936f0fc1dbc3c79b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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