CVE-2026-45983In the Linux kernel, the following vulnerability has been resolved: nfsd: never defer requests during idmap lookup During v4 request compound arg decoding, some ops (e.g.
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In the Linux kernel, the following vulnerability has been resolved: nfsd: never defer requests during idmap lookup During v4 request compound arg decoding, some ops (e.g. SETATTR) can trigger idmap lookup upcalls. When those upcall responses get delayed beyond the allowed time limit, cache_check() will mark the request for deferral and cause it to be dropped. This prevents nfs4svc_encode_compoundres from being executed, and thus the session slot flag NFSD4_SLOT_INUSE never gets cleared. Subsequent client requests will fail with NFSERR_JUKEBOX, given that the slot will be marked as in-use, making the SEQUENCE op fail. Fix this by making sure that the RQ_USEDEFERRAL flag is always clear during nfs4svc_decode_compoundargs(), since no v4 request should ever be deferred.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 2.6.30 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4 | NVD |
References
- https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfdpatch
- https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4patch
- https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593patch
- https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826patch
- https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9patch
- https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23patch
- https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93patch
- https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccbpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.