{"api_version":"1","generated_at":"2026-10-22T00:46:28+00:00","cve":"CVE-2026-98573","urls":{"html":"https://cve.report/CVE-2026-98573","api":"https://cve.report/api/cve/CVE-2026-98573.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98573","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98573"},"summary":{"title":"net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:09","updated_at":"2026-10-19 10:19:15"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf","name":"https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78","name":"https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b","name":"https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12","name":"https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6","name":"https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd","name":"https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962","name":"https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26","name":"https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98573","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98573","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 9c4e432132a97b82edf28fa172c39f743e6bfb26 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 718747afa5463d9cc5fd9a09f03b2a492edd9b78 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 a0ad0473c09d2e947aecac5c82e637ec85924b12 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 b2da5ed3d8c75e1b729a21b6d3beaed415e263f6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 d7f474226809471dc7877435e9c492cc914df0bf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 3b4e0b0c008a8c1b474730248cd5b873026c74bd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/core/skbuff.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9c4e432132a97b82edf28fa172c39f743e6bfb26","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"718747afa5463d9cc5fd9a09f03b2a492edd9b78","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"a0ad0473c09d2e947aecac5c82e637ec85924b12","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"b2da5ed3d8c75e1b729a21b6d3beaed415e263f6","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"d7f474226809471dc7877435e9c492cc914df0bf","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"},{"lessThan":"3b4e0b0c008a8c1b474730248cd5b873026c74bd","status":"affected","version":"1431fb31ecbaba1b5718006128f0f2ed0b94e1c3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/core/skbuff.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:21:58.681Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26"},{"url":"https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78"},{"url":"https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12"},{"url":"https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6"},{"url":"https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b"},{"url":"https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962"},{"url":"https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf"},{"url":"https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd"}],"title":"net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98573","datePublished":"2026-10-18T15:18:38.914Z","dateReserved":"2026-09-25T10:25:14.358Z","dateUpdated":"2026-10-19T09:21:58.681Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:09","lastModifiedDate":"2026-10-19 10:19:15","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98573","Ordinal":"1","Title":"net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6","CVE":"CVE-2026-98573","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98573","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()\n\nskb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max\nargument and passes the result to __pskb_pull_tail() as a signed int.  The\nfunction does not ensure that max is at least skb_headlen(skb).\n\nThis can happen while parsing IPv6 extension headers when an skb already\nhas a linear area larger than MAX_IPV6_HDR_LEN.  Once the parser needs data\nbeyond the linear area, max - skb_headlen(skb) wraps and is converted to a\nnegative delta.  __pskb_pull_tail() then passes that negative length to\nskb_copy_bits(), where it can become a very large copy length.\n\nPass the requested length itself as the pull bound at the three\nextension-header call sites, so the delta can no longer go negative.","Type":"Description","Title":"net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6"}]}}}