{"api_version":"1","generated_at":"2026-04-23T01:19:08+00:00","cve":"CVE-2026-31414","urls":{"html":"https://cve.report/CVE-2026-31414","api":"https://cve.report/api/cve/CVE-2026-31414.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31414","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31414"},"summary":{"title":"netfilter: nf_conntrack_expect: use expect->helper","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: use expect->helper\n\nUse expect->helper in ctnetlink and /proc to dump the helper name.\nUsing nfct_help() without holding a reference to the master conntrack\nis unsafe.\n\nUse exp->master->helper in ctnetlink path if userspace does not provide\nan explicit helper when creating an expectation to retain the existing\nbehaviour. The ctnetlink expectation path holds the reference on the\nmaster conntrack and nf_conntrack_expect lock and the nfnetlink glue\npath refers to the master ct that is attached to the skb.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-13 14:16:10","updated_at":"2026-04-13 15:01:43"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d","name":"https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0","name":"https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781","name":"https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417","name":"https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817","name":"https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306","name":"https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31414","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31414","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e7ccaa0a62a8ff2be5d521299ce79390c318d306 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4bd1b3d839172724b33d8d02c5a4ff6a1c775417 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b53294bff19e56ada2f230ceb8b1ffde61cc3817 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 3dfd3f7712b5a800f2ba632179e9b738076a51f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f01794106042ee27e54af6fdf5b319a2fe3df94d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31414","cve":"CVE-2026-31414","epss":"0.000240000","percentile":"0.066090000","score_date":"2026-04-15","updated_at":"2026-04-16 00:13:56"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nf_conntrack_expect.c","net/netfilter/nf_conntrack_helper.c","net/netfilter/nf_conntrack_netlink.c","net/netfilter/nf_conntrack_sip.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"e7ccaa0a62a8ff2be5d521299ce79390c318d306","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"4bd1b3d839172724b33d8d02c5a4ff6a1c775417","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"b53294bff19e56ada2f230ceb8b1ffde61cc3817","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"3dfd3f7712b5a800f2ba632179e9b738076a51f0","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"f01794106042ee27e54af6fdf5b319a2fe3df94d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nf_conntrack_expect.c","net/netfilter/nf_conntrack_helper.c","net/netfilter/nf_conntrack_netlink.c","net/netfilter/nf_conntrack_sip.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: use expect->helper\n\nUse expect->helper in ctnetlink and /proc to dump the helper name.\nUsing nfct_help() without holding a reference to the master conntrack\nis unsafe.\n\nUse exp->master->helper in ctnetlink path if userspace does not provide\nan explicit helper when creating an expectation to retain the existing\nbehaviour. The ctnetlink expectation path holds the reference on the\nmaster conntrack and nf_conntrack_expect lock and the nfnetlink glue\npath refers to the master ct that is attached to the skb."}],"providerMetadata":{"dateUpdated":"2026-04-13T13:21:02.592Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781"},{"url":"https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306"},{"url":"https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417"},{"url":"https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817"},{"url":"https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0"},{"url":"https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d"}],"title":"netfilter: nf_conntrack_expect: use expect->helper","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31414","datePublished":"2026-04-13T13:21:02.592Z","dateReserved":"2026-03-09T15:48:24.087Z","dateUpdated":"2026-04-13T13:21:02.592Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-13 14:16:10","lastModifiedDate":"2026-04-13 15:01:43","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31414","Ordinal":"1","Title":"netfilter: nf_conntrack_expect: use expect->helper","CVE":"CVE-2026-31414","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31414","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_expect: use expect->helper\n\nUse expect->helper in ctnetlink and /proc to dump the helper name.\nUsing nfct_help() without holding a reference to the master conntrack\nis unsafe.\n\nUse exp->master->helper in ctnetlink path if userspace does not provide\nan explicit helper when creating an expectation to retain the existing\nbehaviour. The ctnetlink expectation path holds the reference on the\nmaster conntrack and nf_conntrack_expect lock and the nfnetlink glue\npath refers to the master ct that is attached to the skb.","Type":"Description","Title":"netfilter: nf_conntrack_expect: use expect->helper"}]}}}