{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72250", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.915Z", "datePublished": "2026-08-15T05:54:39.134Z", "dateUpdated": "2026-08-15T05:54:39.134Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:54:39.134Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_reasm: guard mac_header adjustment after IPv6 defrag\n\nnf_ct_frag6_reasm() slides the packet head forward to drop the IPv6\nfragment header and then unconditionally advances skb->mac_header:\n\n\tskb->mac_header += sizeof(struct frag_hdr);\n\nOn the NF_INET_LOCAL_OUT defrag path the skb has no link-layer header\nyet, so skb->mac_header is still the \"not set\" sentinel (u16)~0U. Adding\nsizeof(struct frag_hdr) wraps it to a small value (0xffff + 8 == 7),\nafter which skb_mac_header_was_set() wrongly reports a MAC header is\npresent and skb_mac_header() points into the headroom.\n\nThe reassembler has done this unconditional add since it was introduced;\nit was harmless while mac_header was a bare pointer, but wrong once\nmac_header became a u16 offset whose unset state is the ~0U sentinel\ntested by skb_mac_header_was_set(). The sibling net/ipv6/reassembly.c\ndoes the same relocation and does guard the adjustment; mirror the\nguard here."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/netfilter/nf_conntrack_reasm.c"], "versions": [{"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "6e8cd710ca35c576f5f2e5a396047c9ac61f75e5", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "2a95ec21824a8ad81ad660b12231456fc0ac9830", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "bbcdef2061b170af45702ce6b359c02c12acfc94", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "cd0d7bbc027b4d3329712cdcdeb4e5567ffd0d58", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "53ef70a315420ed31581d38343684b3bf9a3c76d", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "a58230f3a7c4f6c3261786bc1efb72c42e68cd25", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "00bdce2fda7e430d24cfbc96764a1b96deb31f82", "status": "affected", "versionType": "git"}, {"version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "lessThan": "3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9", "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/ipv6/netfilter/nf_conntrack_reasm.c"], "versions": [{"version": "2.6.15", "status": "affected"}, {"version": "0", "lessThan": "2.6.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc3", "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": "2.6.15", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.15", "versionEndExcluding": "7.2-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e8cd710ca35c576f5f2e5a396047c9ac61f75e5"}, {"url": "https://git.kernel.org/stable/c/2a95ec21824a8ad81ad660b12231456fc0ac9830"}, {"url": "https://git.kernel.org/stable/c/bbcdef2061b170af45702ce6b359c02c12acfc94"}, {"url": "https://git.kernel.org/stable/c/cd0d7bbc027b4d3329712cdcdeb4e5567ffd0d58"}, {"url": "https://git.kernel.org/stable/c/53ef70a315420ed31581d38343684b3bf9a3c76d"}, {"url": "https://git.kernel.org/stable/c/a58230f3a7c4f6c3261786bc1efb72c42e68cd25"}, {"url": "https://git.kernel.org/stable/c/00bdce2fda7e430d24cfbc96764a1b96deb31f82"}, {"url": "https://git.kernel.org/stable/c/3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9"}], "title": "netfilter: nf_conntrack_reasm: guard mac_header adjustment after IPv6 defrag", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/netfilter/nf_conntrack_reasm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6e8cd710ca35c576f5f2e5a396047c9ac61f75e5", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "2a95ec21824a8ad81ad660b12231456fc0ac9830", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "bbcdef2061b170af45702ce6b359c02c12acfc94", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "cd0d7bbc027b4d3329712cdcdeb4e5567ffd0d58", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "53ef70a315420ed31581d38343684b3bf9a3c76d", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "a58230f3a7c4f6c3261786bc1efb72c42e68cd25", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "00bdce2fda7e430d24cfbc96764a1b96deb31f82", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}, {"lessThan": "3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9", "status": "affected", "version": "9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/netfilter/nf_conntrack_reasm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.15"}, {"lessThan": "2.6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_reasm: guard mac_header adjustment after IPv6 defrag\n\nnf_ct_frag6_reasm() slides the packet head forward to drop the IPv6\nfragment header and then unconditionally advances skb->mac_header:\n\n\tskb->mac_header += sizeof(struct frag_hdr);\n\nOn the NF_INET_LOCAL_OUT defrag path the skb has no link-layer header\nyet, so skb->mac_header is still the \"not set\" sentinel (u16)~0U. Adding\nsizeof(struct frag_hdr) wraps it to a small value (0xffff + 8 == 7),\nafter which skb_mac_header_was_set() wrongly reports a MAC header is\npresent and skb_mac_header() points into the headroom.\n\nThe reassembler has done this unconditional add since it was introduced;\nit was harmless while mac_header was a bare pointer, but wrong once\nmac_header became a u16 offset whose unset state is the ~0U sentinel\ntested by skb_mac_header_was_set(). The sibling net/ipv6/reassembly.c\ndoes the same relocation and does guard the adjustment; mirror the\nguard here."}], "id": "CVE-2026-72250", "lastModified": "2026-08-15T06:21:52.267", "metrics": {}, "published": "2026-08-15T06:21:52.267", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00bdce2fda7e430d24cfbc96764a1b96deb31f82"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a95ec21824a8ad81ad660b12231456fc0ac9830"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53ef70a315420ed31581d38343684b3bf9a3c76d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e8cd710ca35c576f5f2e5a396047c9ac61f75e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a58230f3a7c4f6c3261786bc1efb72c42e68cd25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbcdef2061b170af45702ce6b359c02c12acfc94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cd0d7bbc027b4d3329712cdcdeb4e5567ffd0d58"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,6e8cd710ca35c576f5f2e5a396047c9ac61f75e5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,2a95ec21824a8ad81ad660b12231456fc0ac9830)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,53ef70a315420ed31581d38343684b3bf9a3c76d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,a58230f3a7c4f6c3261786bc1efb72c42e68cd25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,00bdce2fda7e430d24cfbc96764a1b96deb31f82)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1,53ef70a315420ed31581d38343684b3bf9a3c76d)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T17:45:02.964825+00:00", "updated": "2026-08-15T19:15:03.350498+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125"]}