{"id":"CVE-2026-64353","state":"PUBLISHED","title":"bpf: Keep dynamic inner array lookups nullable","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Keep dynamic inner array lookups nullable\n\nAn ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its\ninner map template. A concrete inner array with a different max_entries\nvalue can then replace the template.\n\nAfter a successful outer map lookup, the verifier represents the\nresulting map pointer using the inner map template. Const-key lookup\nnullness elision consequently uses the template max_entries even though\nthe runtime helper uses the concrete inner map max_entries.\n\nDo not elide lookup result nullness for maps marked with BPF_F_INNER_MAP,\nbecause the template max_entries does not prove that the key is in bounds\nfor the concrete runtime map.","publishedAt":"2026-07-25T08:50:12.120Z","updatedAt":"2026-08-17T04:53:58.950Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"0b92ad64d6e4bde85e6b9888404f9a7a2b65d269","versionType":"git"},{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"d57db0d975053e01410c54e708a85b6d32ef2ebd","versionType":"git"},{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"53040a81ae57cdca8af8ac36fe4e661730cf7c6b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]}],"references":["https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269","https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd","https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64353.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64353","state":"PUBLISHED","datePublished":"2026-07-25T08:50:12.120Z","dateUpdated":"2026-08-17T04:53:58.950Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.782Z"},"containers":{"cna":{"title":"bpf: Keep dynamic inner array lookups nullable","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Keep dynamic inner array lookups nullable\n\nAn ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its\ninner map template. A concrete inner array with a different max_entries\nvalue can then replace the template.\n\nAfter a successful outer map lookup, the verifier represents the\nresulting map pointer using the inner map template. Const-key lookup\nnullness elision consequently uses the template max_entries even though\nthe runtime helper uses the concrete inner map max_entries.\n\nDo not elide lookup result nullness for maps marked with BPF_F_INNER_MAP,\nbecause the template max_entries does not prove that the key is in bounds\nfor the concrete runtime map."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"0b92ad64d6e4bde85e6b9888404f9a7a2b65d269","versionType":"git"},{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"d57db0d975053e01410c54e708a85b6d32ef2ebd","versionType":"git"},{"version":"d2102f2f5d75a84dbab6ff890359f0bd4a18ca22","status":"affected","lessThan":"53040a81ae57cdca8af8ac36fe4e661730cf7c6b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269"},{"url":"https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd"},{"url":"https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:53:58.950Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}