CVE-2026-45983

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-45983
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd Patch
https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4 Patch
https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593 Patch
https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826 Patch
https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9 Patch
https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23 Patch
https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93 Patch
https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

16 Jun 2026, 02:39

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd - () https://git.kernel.org/stable/c/063a6f22478ef929625000a2caf54667725c1dfd - Patch
References () https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4 - () https://git.kernel.org/stable/c/243f71ed873ff3feeb6f9b5cb145d63f7188b4c4 - Patch
References () https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593 - () https://git.kernel.org/stable/c/3a72c7dedc99b321e0f267e4e999e5baf07c4593 - Patch
References () https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826 - () https://git.kernel.org/stable/c/8dff54fe88c0dcd4c55bff9fc2fa6ca968290826 - Patch
References () https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9 - () https://git.kernel.org/stable/c/99e17b20fddac19a228d213e00f6b9e1c10daff9 - Patch
References () https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23 - () https://git.kernel.org/stable/c/b9abb760db20504240a7147f27934d900cd80b23 - Patch
References () https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93 - () https://git.kernel.org/stable/c/d75ec4504a4340b033b15cad0303988b3089dd93 - Patch
References () https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb - () https://git.kernel.org/stable/c/f9c206cdc4266caad6a9a7f46341420a10f03ccb - Patch
First Time Linux linux Kernel
Linux
CWE NVD-CWE-noinfo

27 May 2026, 14:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-27 14:17

Updated : 2026-06-17 10:52

NVD link : CVE-2026-45983

Mitre link : CVE-2026-45983

CVE.ORG link : CVE-2026-45983

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo