{"cve":"CVE-2026-45983","nvd":{"published":"2026-05-27T14:17:15.500","modified":"2026-06-17T10:52:50.720","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd","https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4","https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593","https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826","https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-45983","score":0.00123,"percentile":0.02027,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}