{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74597", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.919Z", "datePublished": "2026-08-22T15:31:47.120Z", "dateUpdated": "2026-08-22T15:31:47.120Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:31:47.120Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip6_tunnel: clear skb2->cb[] in ip6ip6_err()\n\nip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the\nquoted inner IPv6 packet, and then passes the clone to icmpv6_send().\nThe clone still carries the outer packet's inet6_skb_parm in skb->cb.\n\nIf the outer packet had a Home Address Option, IP6CB(skb2)->dsthao\nremains non-zero after skb_pull(). icmpv6_send() later calls\nmip6_addr_swap(), which uses that stale dsthao offset against the quoted\ninner packet. A malformed inner destination-options header can then make\nthe HAO lookup and address swap run past the end of the quoted packet\nand corrupt skb_shared_info.\n\nClear skb2->cb[] before pulling the quoted inner IPv6 packet so the\nreply path does not reuse metadata left by the outer IPv6 stack."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_tunnel.c"], "versions": [{"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "44fe898df302e91c5ee5acbc71ffa74e78e6c183", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "0dadb0620ab65949a8bc2439dd28ea3c942fe87d", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "b6816536a2990c0db44a26130a03e40b441e829b", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "64e41736a26f37ab6215bc2e6df125df05aceb08", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "484134e1eb07d700a73b1e4bbf3fb503e299be60", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "4eb15c465337b18f44716c499cd6ad63eee0ad54", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "fbf40faa0414b753212494ad197542002e66ed9e", "status": "affected", "versionType": "git"}, {"version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "lessThan": "f803c086399da277b5d0ff36a107d0f162751800", "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/ip6_tunnel.c"], "versions": [{"version": "2.6.22", "status": "affected"}, {"version": "0", "lessThan": "2.6.22", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "2.6.22", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183"}, {"url": "https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d"}, {"url": "https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b"}, {"url": "https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08"}, {"url": "https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60"}, {"url": "https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54"}, {"url": "https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e"}, {"url": "https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800"}], "title": "ip6_tunnel: clear skb2->cb[] in ip6ip6_err()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/ip6_tunnel.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "44fe898df302e91c5ee5acbc71ffa74e78e6c183", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "0dadb0620ab65949a8bc2439dd28ea3c942fe87d", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "b6816536a2990c0db44a26130a03e40b441e829b", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "64e41736a26f37ab6215bc2e6df125df05aceb08", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "484134e1eb07d700a73b1e4bbf3fb503e299be60", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "4eb15c465337b18f44716c499cd6ad63eee0ad54", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "fbf40faa0414b753212494ad197542002e66ed9e", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}, {"lessThan": "f803c086399da277b5d0ff36a107d0f162751800", "status": "affected", "version": "e490d1d85cf5e191791979e5f260d32eb4f703a8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/ip6_tunnel.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.22"}, {"lessThan": "2.6.22", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nip6_tunnel: clear skb2->cb[] in ip6ip6_err()\n\nip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the\nquoted inner IPv6 packet, and then passes the clone to icmpv6_send().\nThe clone still carries the outer packet's inet6_skb_parm in skb->cb.\n\nIf the outer packet had a Home Address Option, IP6CB(skb2)->dsthao\nremains non-zero after skb_pull(). icmpv6_send() later calls\nmip6_addr_swap(), which uses that stale dsthao offset against the quoted\ninner packet. A malformed inner destination-options header can then make\nthe HAO lookup and address swap run past the end of the quoted packet\nand corrupt skb_shared_info.\n\nClear skb2->cb[] before pulling the quoted inner IPv6 packet so the\nreply path does not reuse metadata left by the outer IPv6 stack."}], "id": "CVE-2026-74597", "lastModified": "2026-08-22T16:16:32.040", "metrics": {}, "published": "2026-08-22T16:16:32.040", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,44fe898df302e91c5ee5acbc71ffa74e78e6c183)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,0dadb0620ab65949a8bc2439dd28ea3c942fe87d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,b6816536a2990c0db44a26130a03e40b441e829b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,64e41736a26f37ab6215bc2e6df125df05aceb08)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,484134e1eb07d700a73b1e4bbf3fb503e299be60)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,4eb15c465337b18f44716c499cd6ad63eee0ad54)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,fbf40faa0414b753212494ad197542002e66ed9e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e490d1d85cf5e191791979e5f260d32eb4f703a8,f803c086399da277b5d0ff36a107d0f162751800)"}}], "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": "2.6.22"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.22)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.265,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.216,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.183,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-08-22T17:00:10.306323+00:00", "updated": "2026-08-22T17:30:02.934484+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-787"]}