bpf: Keep dynamic inner array lookups nullable

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64353
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:17 UTC
Updated2026-07-25 10:17:17 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Keep dynamic inner array lookups nullable An ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its inner map template. A concrete inner array with a different max_entries value can then replace the template. After a successful outer map lookup, the verifier represents the resulting map pointer using the inner map template. Const-key lookup nullness elision consequently uses the template max_entries even though the runtime helper uses the concrete inner map max_entries. Do not elide lookup result nullness for maps marked with BPF_F_INNER_MAP, because the template max_entries does not prove that the key is in bounds for the concrete runtime map.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.062420000 (date 2026-07-28)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d2102f2f5d75a84dbab6ff890359f0bd4a18ca22 0b92ad64d6e4bde85e6b9888404f9a7a2b65d269 git Not specified
CNA Linux Linux affected d2102f2f5d75a84dbab6ff890359f0bd4a18ca22 d57db0d975053e01410c54e708a85b6d32ef2ebd git Not specified
CNA Linux Linux affected d2102f2f5d75a84dbab6ff890359f0bd4a18ca22 53040a81ae57cdca8af8ac36fe4e661730cf7c6b git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 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/d57db0d975053e01410c54e708a85b6d32ef2ebd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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