{"api_version":"1","generated_at":"2026-10-06T22:59:47+00:00","cve":"CVE-2026-98241","urls":{"html":"https://cve.report/CVE-2026-98241","api":"https://cve.report/api/cve/CVE-2026-98241.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98241","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98241"},"summary":{"title":"ipv6: xfrm: use full sockets in local error paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: xfrm: use full sockets in local error paths\n\nxfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb->sk as if it\nalways pointed at a full IPv6 socket.\n\nThat is not guaranteed. TCP SYN-ACK skbs can be owned by a\nTCP_NEW_SYN_RECV request_sock while the output path itself is driven by the\nfull listener. If rerouting selects an IPv6 XFRM tunnel route with a lower\nMTU, the local PMTU/error handling path can reach these callbacks with that\nmini-socket still attached to the skb.\n\nThe callbacks then miscast the request socket as a full inet/IPv6 socket and\ncan read beyond the request_sock allocation when they access inet_sock or\nipv6_pinfo state.\n\nResolve the owner with skb_to_full_sk() in both callbacks and bail out when\nno full socket is attached. This matches the surrounding XFRM IPv6 PMTU/error\nlogic, which already reasons about full sockets with skb_to_full_sk().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:12","updated_at":"2026-10-06 09:18:12"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8","name":"https://git.kernel.org/stable/c/c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca3d68c3213475b53db6647e159dc73bd1af5ab1","name":"https://git.kernel.org/stable/c/ca3d68c3213475b53db6647e159dc73bd1af5ab1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/904a0e827d0d7189271a3a2eb648293809f25efc","name":"https://git.kernel.org/stable/c/904a0e827d0d7189271a3a2eb648293809f25efc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b1a88633c36d2cbc3831382f3846754d344276fd","name":"https://git.kernel.org/stable/c/b1a88633c36d2cbc3831382f3846754d344276fd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/60459c670329d586a58db5d8f811fa5accfe4862","name":"https://git.kernel.org/stable/c/60459c670329d586a58db5d8f811fa5accfe4862","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6973a21ee73c5567f883813c8ef414774b45892f","name":"https://git.kernel.org/stable/c/6973a21ee73c5567f883813c8ef414774b45892f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4c030a0400ebfd2318361c923a88103b2c67c49f","name":"https://git.kernel.org/stable/c/4c030a0400ebfd2318361c923a88103b2c67c49f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/675919e08ce266b8cac11fd9af29170e762a480f","name":"https://git.kernel.org/stable/c/675919e08ce266b8cac11fd9af29170e762a480f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98241","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98241","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 b1a88633c36d2cbc3831382f3846754d344276fd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 904a0e827d0d7189271a3a2eb648293809f25efc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 675919e08ce266b8cac11fd9af29170e762a480f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 60459c670329d586a58db5d8f811fa5accfe4862 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 ca3d68c3213475b53db6647e159dc73bd1af5ab1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 4c030a0400ebfd2318361c923a88103b2c67c49f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dd767856a36e00b631d65ebc4bb81b19915532d6 6973a21ee73c5567f883813c8ef414774b45892f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.2 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 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc4 * 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/xfrm6_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b1a88633c36d2cbc3831382f3846754d344276fd","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"904a0e827d0d7189271a3a2eb648293809f25efc","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"675919e08ce266b8cac11fd9af29170e762a480f","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"60459c670329d586a58db5d8f811fa5accfe4862","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"ca3d68c3213475b53db6647e159dc73bd1af5ab1","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"4c030a0400ebfd2318361c923a88103b2c67c49f","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"},{"lessThan":"6973a21ee73c5567f883813c8ef414774b45892f","status":"affected","version":"dd767856a36e00b631d65ebc4bb81b19915532d6","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/xfrm6_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.2"},{"lessThan":"3.2","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":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"3.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc4","versionStartIncluding":"3.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: xfrm: use full sockets in local error paths\n\nxfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb->sk as if it\nalways pointed at a full IPv6 socket.\n\nThat is not guaranteed. TCP SYN-ACK skbs can be owned by a\nTCP_NEW_SYN_RECV request_sock while the output path itself is driven by the\nfull listener. If rerouting selects an IPv6 XFRM tunnel route with a lower\nMTU, the local PMTU/error handling path can reach these callbacks with that\nmini-socket still attached to the skb.\n\nThe callbacks then miscast the request socket as a full inet/IPv6 socket and\ncan read beyond the request_sock allocation when they access inet_sock or\nipv6_pinfo state.\n\nResolve the owner with skb_to_full_sk() in both callbacks and bail out when\nno full socket is attached. This matches the surrounding XFRM IPv6 PMTU/error\nlogic, which already reasons about full sockets with skb_to_full_sk()."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:45:11.954Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b1a88633c36d2cbc3831382f3846754d344276fd"},{"url":"https://git.kernel.org/stable/c/904a0e827d0d7189271a3a2eb648293809f25efc"},{"url":"https://git.kernel.org/stable/c/675919e08ce266b8cac11fd9af29170e762a480f"},{"url":"https://git.kernel.org/stable/c/60459c670329d586a58db5d8f811fa5accfe4862"},{"url":"https://git.kernel.org/stable/c/ca3d68c3213475b53db6647e159dc73bd1af5ab1"},{"url":"https://git.kernel.org/stable/c/4c030a0400ebfd2318361c923a88103b2c67c49f"},{"url":"https://git.kernel.org/stable/c/c21f3f7fbfeda7c5794f606cb0ffcc2d9001eef8"},{"url":"https://git.kernel.org/stable/c/6973a21ee73c5567f883813c8ef414774b45892f"}],"title":"ipv6: xfrm: use full sockets in local error paths","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98241","datePublished":"2026-10-06T08:45:11.954Z","dateReserved":"2026-09-25T10:25:14.329Z","dateUpdated":"2026-10-06T08:45:11.954Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:12","lastModifiedDate":"2026-10-06 09:18:12","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98241","Ordinal":"1","Title":"ipv6: xfrm: use full sockets in local error paths","CVE":"CVE-2026-98241","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98241","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: xfrm: use full sockets in local error paths\n\nxfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb->sk as if it\nalways pointed at a full IPv6 socket.\n\nThat is not guaranteed. TCP SYN-ACK skbs can be owned by a\nTCP_NEW_SYN_RECV request_sock while the output path itself is driven by the\nfull listener. If rerouting selects an IPv6 XFRM tunnel route with a lower\nMTU, the local PMTU/error handling path can reach these callbacks with that\nmini-socket still attached to the skb.\n\nThe callbacks then miscast the request socket as a full inet/IPv6 socket and\ncan read beyond the request_sock allocation when they access inet_sock or\nipv6_pinfo state.\n\nResolve the owner with skb_to_full_sk() in both callbacks and bail out when\nno full socket is attached. This matches the surrounding XFRM IPv6 PMTU/error\nlogic, which already reasons about full sockets with skb_to_full_sk().","Type":"Description","Title":"ipv6: xfrm: use full sockets in local error paths"}]}}}