{"api_version":"1","generated_at":"2026-05-13T07:41:45+00:00","cve":"CVE-2026-43453","urls":{"html":"https://cve.report/CVE-2026-43453","api":"https://cve.report/api/cve/CVE-2026-43453.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43453","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43453"},"summary":{"title":"netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:58","updated_at":"2026-05-12 14:10:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62","name":"https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f","name":"https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0","name":"https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e","name":"https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75","name":"https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d","name":"https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d","name":"https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5","name":"https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43453","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43453","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3c4287f62044a90e73a561aa05fc46e62da173da 1957e793196e7f8557374fd4eda53abcbb42e1c0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3c4287f62044a90e73a561aa05fc46e62da173da 57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3c4287f62044a90e73a561aa05fc46e62da173da 60c1d18781e37bfb96290b86510eb01c5fa24d75 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3c4287f62044a90e73a561aa05fc46e62da173da 0a55d62cdb628923d8a21724374a70c76ac7d19d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.19 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43453","cve":"CVE-2026-43453","epss":"0.000240000","percentile":"0.070360000","score_date":"2026-05-12","updated_at":"2026-05-13 00:11:53"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_set_pipapo.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1957e793196e7f8557374fd4eda53abcbb42e1c0","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"60c1d18781e37bfb96290b86510eb01c5fa24d75","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"0a55d62cdb628923d8a21724374a70c76ac7d19d","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"dfbdac719198778b581bc0dd055df2542edb8c62","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"e047f6fbb975f685d6c9fcef95b3b7787a79b46d","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"324b749aa5b2d516ccfab933df9d3f56e7807f5f","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"},{"lessThan":"d6d8cd2db236a9dd13dbc2d05843b3445cc964b5","status":"affected","version":"3c4287f62044a90e73a561aa05fc46e62da173da","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_set_pipapo.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.6"},{"lessThan":"5.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.253","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.253","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.19","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"5.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:24:52.944Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43453","datePublished":"2026-05-08T14:22:18.087Z","dateReserved":"2026-05-01T14:12:56.010Z","dateUpdated":"2026-05-11T22:24:52.944Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:58","lastModifiedDate":"2026-05-12 14:10:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43453","Ordinal":"1","Title":"netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipap","CVE":"CVE-2026-43453","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43453","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipap"}]}}}