{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","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","source":"CNA: Linux","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"}]}],"cveId":"CVE-2026-43453","cwes":[],"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.","epss":{"date":"2026-11-06","percentile":0.02286,"score":0.00126},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793979775723,"publishedAt":1778250138087,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5"}],"remediation":[],"revision":"bfb2dd30e30884e63a49f9d3c8a8d781b0e278728ebed6f163b0b95fe74843b5","sources":[{"modifiedAt":1793979775723,"name":"CNA: Linux","retrievedAt":1793981718790,"url":"https://www.cve.org/CVERecord?id=CVE-2026-43453"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793981730581,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-43453"}],"ssvc":{"assessedAt":1793979562846,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()","updatedAt":1793981730581}