{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43453","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.010Z","datePublished":"2026-05-08T14:22:18.087Z","dateUpdated":"2026-05-11T22:24:52.944Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:24:52.944Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()\n\npipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the\nto_offset argument on every iteration, including the last one where\ni == m->field_count - 1. This reads one element past the end of the\nstack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]\nwith NFT_PIPAPO_MAX_FIELDS == 16).\n\nAlthough pipapo_unmap() returns early when is_last is true without\nusing the to_offset value, the argument is evaluated at the call site\nbefore the function body executes, making this a genuine out-of-bounds\nstack read confirmed by KASAN:\n\n  BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]\n  Read of size 4 at addr ffff8000810e71a4\n\n  This frame has 1 object:\n   [32, 160) 'rulemap'\n\n  The buggy address is at offset 164 -- exactly 4 bytes past the end\n  of the rulemap array.\n\nPass 0 instead of rulemap[i + 1].n on the last iteration to avoid\nthe out-of-bounds read."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_pipapo.c"],"versions":[{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"1957e793196e7f8557374fd4eda53abcbb42e1c0","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"60c1d18781e37bfb96290b86510eb01c5fa24d75","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"0a55d62cdb628923d8a21724374a70c76ac7d19d","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"dfbdac719198778b581bc0dd055df2542edb8c62","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"e047f6fbb975f685d6c9fcef95b3b7787a79b46d","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"324b749aa5b2d516ccfab933df9d3f56e7807f5f","status":"affected","versionType":"git"},{"version":"3c4287f62044a90e73a561aa05fc46e62da173da","lessThan":"d6d8cd2db236a9dd13dbc2d05843b3445cc964b5","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_set_pipapo.c"],"versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","status":"unaffected","versionType":"semver"},{"version":"5.10.253","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.19","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.9","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.10.253"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0"},{"url":"https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e"},{"url":"https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75"},{"url":"https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d"},{"url":"https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62"},{"url":"https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d"},{"url":"https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f"},{"url":"https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5"}],"title":"netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()","x_generator":{"engine":"bippy-1.2.0"}}}}