{"api_version":"1","generated_at":"2026-06-05T08:30:43+00:00","cve":"CVE-2026-31663","urls":{"html":"https://cve.report/CVE-2026-31663","api":"https://cve.report/api/cve/CVE-2026-31663.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31663","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31663"},"summary":{"title":"xfrm: hold dev ref until after transport_finish NF_HOOK","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: hold dev ref until after transport_finish NF_HOOK\n\nAfter async crypto completes, xfrm_input_resume() calls dev_put()\nimmediately on re-entry before the skb reaches transport_finish.\nThe skb->dev pointer is then used inside NF_HOOK and its okfn,\nwhich can race with device teardown.\n\nRemove the dev_put from the async resumption entry and instead\ndrop the reference after the NF_HOOK call in transport_finish,\nusing a saved device pointer since NF_HOOK may consume the skb.\nThis covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip\nthe okfn.\n\nFor non-transport exits (decaps, gro, drop) and secondary\nasync return points, release the reference inline when\nasync is set.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-24 15:16:45","updated_at":"2026-04-27 19:59:32"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b","name":"https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb","name":"https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2","name":"https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31663","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31663","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected acf568ee859f098279eadf551612f103afdacb4e 0f451b43c88bf2b9c038b414be580efee42e031b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected acf568ee859f098279eadf551612f103afdacb4e 5002beda5cac69d522dc54da0d5d463ed9c963d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected acf568ee859f098279eadf551612f103afdacb4e 1c428b03840094410c5fb6a5db30640486bbbfcb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 69895c5ea0ca2e8d7de1e6d36965d0ab9730787f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 833760100588acfb267dac4d6a02ab9931237739 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e095ecaec6d94aa2156cceb98a85d409b51190f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.23 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.13 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":[{"cve_year":"2026","cve_id":"31663","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31663","cve":"CVE-2026-31663","epss":"0.000170000","percentile":"0.040590000","score_date":"2026-04-27","updated_at":"2026-04-28 00:06:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/xfrm4_input.c","net/ipv6/xfrm6_input.c","net/xfrm/xfrm_input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0f451b43c88bf2b9c038b414be580efee42e031b","status":"affected","version":"acf568ee859f098279eadf551612f103afdacb4e","versionType":"git"},{"lessThan":"5002beda5cac69d522dc54da0d5d463ed9c963d2","status":"affected","version":"acf568ee859f098279eadf551612f103afdacb4e","versionType":"git"},{"lessThan":"1c428b03840094410c5fb6a5db30640486bbbfcb","status":"affected","version":"acf568ee859f098279eadf551612f103afdacb4e","versionType":"git"},{"status":"affected","version":"69895c5ea0ca2e8d7de1e6d36965d0ab9730787f","versionType":"git"},{"status":"affected","version":"833760100588acfb267dac4d6a02ab9931237739","versionType":"git"},{"status":"affected","version":"e095ecaec6d94aa2156cceb98a85d409b51190f3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/xfrm4_input.c","net/ipv6/xfrm6_input.c","net/xfrm/xfrm_input.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.15"},{"lessThan":"4.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.23","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.13","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":"6.18.23","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.13","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.100","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.55","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.24","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: hold dev ref until after transport_finish NF_HOOK\n\nAfter async crypto completes, xfrm_input_resume() calls dev_put()\nimmediately on re-entry before the skb reaches transport_finish.\nThe skb->dev pointer is then used inside NF_HOOK and its okfn,\nwhich can race with device teardown.\n\nRemove the dev_put from the async resumption entry and instead\ndrop the reference after the NF_HOOK call in transport_finish,\nusing a saved device pointer since NF_HOOK may consume the skb.\nThis covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip\nthe okfn.\n\nFor non-transport exits (decaps, gro, drop) and secondary\nasync return points, release the reference inline when\nasync is set."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-04-27T14:04:48.248Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b"},{"url":"https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2"},{"url":"https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb"}],"title":"xfrm: hold dev ref until after transport_finish NF_HOOK","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31663","datePublished":"2026-04-24T14:45:13.239Z","dateReserved":"2026-03-09T15:48:24.129Z","dateUpdated":"2026-04-27T14:04:48.248Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-24 15:16:45","lastModifiedDate":"2026-04-27 19:59:32","problem_types":["NVD-CWE-noinfo"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.100","versionEndExcluding":"3.3","matchCriteriaId":"6B10F87F-6387-4CE3-9159-D77EB163C9AD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.55","versionEndExcluding":"3.17","matchCriteriaId":"C9F9D919-846F-4FDC-882F-B49219EA19E9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.24","versionEndExcluding":"4.15","matchCriteriaId":"4C6AA567-92EC-46CF-9ED1-2B04B2B29BFB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15.1","versionEndExcluding":"6.18.23","matchCriteriaId":"45125EC8-B49D-48DD-92B9-2E4D1295531E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.13","matchCriteriaId":"1490EF9B-9080-481C-8D22-1306AAE664E4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:4.15:-:*:*:*:*:*:*","matchCriteriaId":"3B4D39AF-668B-442B-8085-639A6D4FA5AC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*","matchCriteriaId":"512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31663","Ordinal":"1","Title":"xfrm: hold dev ref until after transport_finish NF_HOOK","CVE":"CVE-2026-31663","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31663","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: hold dev ref until after transport_finish NF_HOOK\n\nAfter async crypto completes, xfrm_input_resume() calls dev_put()\nimmediately on re-entry before the skb reaches transport_finish.\nThe skb->dev pointer is then used inside NF_HOOK and its okfn,\nwhich can race with device teardown.\n\nRemove the dev_put from the async resumption entry and instead\ndrop the reference after the NF_HOOK call in transport_finish,\nusing a saved device pointer since NF_HOOK may consume the skb.\nThis covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip\nthe okfn.\n\nFor non-transport exits (decaps, gro, drop) and secondary\nasync return points, release the reference inline when\nasync is set.","Type":"Description","Title":"xfrm: hold dev ref until after transport_finish NF_HOOK"}]}}}