{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45983", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.090Z", "datePublished": "2026-05-27T12:18:41.619Z", "dateUpdated": "2026-05-27T12:18:41.619Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:18:41.619Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: never defer requests during idmap lookup\n\nDuring v4 request compound arg decoding, some ops (e.g. SETATTR)\ncan trigger idmap lookup upcalls. When those upcall responses get\ndelayed beyond the allowed time limit, cache_check() will mark the\nrequest for deferral and cause it to be dropped.\n\nThis prevents nfs4svc_encode_compoundres from being executed, and\nthus the session slot flag NFSD4_SLOT_INUSE never gets cleared.\nSubsequent client requests will fail with NFSERR_JUKEBOX, given\nthat the slot will be marked as in-use, making the SEQUENCE op\nfail.\n\nFix this by making sure that the RQ_USEDEFERRAL flag is always\nclear during nfs4svc_decode_compoundargs(), since no v4 request\nshould ever be deferred."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4idmap.c", "fs/nfsd/nfs4proc.c", "fs/nfsd/nfs4xdr.c"], "versions": [{"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "b9abb760db20504240a7147f27934d900cd80b23", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "3a72c7dedc99b321e0f267e4e999e5baf07c4593", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "99e17b20fddac19a228d213e00f6b9e1c10daff9", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "243f71ed873ff3feeb6f9b5cb145d63f7188b4c4", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "063a6f22478ef929625000a2caf54667725c1dfd", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "d75ec4504a4340b033b15cad0303988b3089dd93", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "8dff54fe88c0dcd4c55bff9fc2fa6ca968290826", "status": "affected", "versionType": "git"}, {"version": "2f425878b6a71571341dcd3f9e9d1a6f6355da9c", "lessThan": "f9c206cdc4266caad6a9a7f46341420a10f03ccb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4idmap.c", "fs/nfsd/nfs4proc.c", "fs/nfsd/nfs4xdr.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "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": "2.6.30", "versionEndExcluding": "5.10.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23"}, {"url": "https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593"}, {"url": "https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9"}, {"url": "https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4"}, {"url": "https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd"}, {"url": "https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93"}, {"url": "https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826"}, {"url": "https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb"}], "title": "nfsd: never defer requests during idmap lookup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: never defer requests during idmap lookup\n\nDuring v4 request compound arg decoding, some ops (e.g. SETATTR)\ncan trigger idmap lookup upcalls. When those upcall responses get\ndelayed beyond the allowed time limit, cache_check() will mark the\nrequest for deferral and cause it to be dropped.\n\nThis prevents nfs4svc_encode_compoundres from being executed, and\nthus the session slot flag NFSD4_SLOT_INUSE never gets cleared.\nSubsequent client requests will fail with NFSERR_JUKEBOX, given\nthat the slot will be marked as in-use, making the SEQUENCE op\nfail.\n\nFix this by making sure that the RQ_USEDEFERRAL flag is always\nclear during nfs4svc_decode_compoundargs(), since no v4 request\nshould ever be deferred."}], "id": "CVE-2026-45983", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:15.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,b9abb760db20504240a7147f27934d900cd80b23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,3a72c7dedc99b321e0f267e4e999e5baf07c4593)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,99e17b20fddac19a228d213e00f6b9e1c10daff9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,243f71ed873ff3feeb6f9b5cb145d63f7188b4c4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,063a6f22478ef929625000a2caf54667725c1dfd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,d75ec4504a4340b033b15cad0303988b3089dd93)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,8dff54fe88c0dcd4c55bff9fc2fa6ca968290826)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f425878b6a71571341dcd3f9e9d1a6f6355da9c,f9c206cdc4266caad6a9a7f46341420a10f03ccb)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.30"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.30)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.252,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.202,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.165,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T17:15:38.213000+00:00", "updated": "2026-05-27T21:15:25.643133+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-775", "CWE-640"]}