{"api_version":"1","generated_at":"2026-08-23T15:23:20+00:00","cve":"CVE-2026-74597","urls":{"html":"https://cve.report/CVE-2026-74597","api":"https://cve.report/api/cve/CVE-2026-74597.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74597","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74597"},"summary":{"title":"ip6_tunnel: clear skb2->cb[] in ip6ip6_err()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:32","updated_at":"2026-08-22 16:16:32"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b","name":"https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54","name":"https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d","name":"https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08","name":"https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183","name":"https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800","name":"https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60","name":"https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e","name":"https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74597","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74597","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 44fe898df302e91c5ee5acbc71ffa74e78e6c183 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 0dadb0620ab65949a8bc2439dd28ea3c942fe87d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 b6816536a2990c0db44a26130a03e40b441e829b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 64e41736a26f37ab6215bc2e6df125df05aceb08 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 484134e1eb07d700a73b1e4bbf3fb503e299be60 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 4eb15c465337b18f44716c499cd6ad63eee0ad54 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 fbf40faa0414b753212494ad197542002e66ed9e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e490d1d85cf5e191791979e5f260d32eb4f703a8 f803c086399da277b5d0ff36a107d0f162751800 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.22","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.22 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.265 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * 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/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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"2.6.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.22","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:31:47.120Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74597","datePublished":"2026-08-22T15:31:47.120Z","dateReserved":"2026-08-15T05:44:03.919Z","dateUpdated":"2026-08-22T15:31:47.120Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:32","lastModifiedDate":"2026-08-22 16:16:32","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74597","Ordinal":"1","Title":"ip6_tunnel: clear skb2->cb[] in ip6ip6_err()","CVE":"CVE-2026-74597","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74597","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ip6_tunnel: clear skb2->cb[] in ip6ip6_err()"}]}}}