{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31663", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.129Z", "datePublished": "2026-04-24T14:45:13.239Z", "dateUpdated": "2026-04-24T14:45:13.239Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-24T14:45:13.239Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/xfrm4_input.c", "net/ipv6/xfrm6_input.c", "net/xfrm/xfrm_input.c"], "versions": [{"version": "acf568ee859f098279eadf551612f103afdacb4e", "lessThan": "0f451b43c88bf2b9c038b414be580efee42e031b", "status": "affected", "versionType": "git"}, {"version": "acf568ee859f098279eadf551612f103afdacb4e", "lessThan": "5002beda5cac69d522dc54da0d5d463ed9c963d2", "status": "affected", "versionType": "git"}, {"version": "acf568ee859f098279eadf551612f103afdacb4e", "lessThan": "1c428b03840094410c5fb6a5db30640486bbbfcb", "status": "affected", "versionType": "git"}, {"version": "69895c5ea0ca2e8d7de1e6d36965d0ab9730787f", "status": "affected", "versionType": "git"}, {"version": "833760100588acfb267dac4d6a02ab9931237739", "status": "affected", "versionType": "git"}, {"version": "e095ecaec6d94aa2156cceb98a85d409b51190f3", "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/ipv4/xfrm4_input.c", "net/ipv6/xfrm6_input.c", "net/xfrm/xfrm_input.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.23", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.13", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "4.15", "versionEndExcluding": "6.18.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.19.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.0"}, {"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"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-31663", "lastModified": "2026-04-24T17:51:40.810", "metrics": {}, "published": "2026-04-24T15:16:45.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f451b43c88bf2b9c038b414be580efee42e031b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1c428b03840094410c5fb6a5db30640486bbbfcb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5002beda5cac69d522dc54da0d5d463ed9c963d2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}