CVE-2026-45983None▾ SunlitIn 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 res…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < b9abb760db20504240a7147f27934d900cd80b23Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < 3a72c7dedc99b321e0f267e4e999e5baf07c4593Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < 99e17b20fddac19a228d213e00f6b9e1c10daff9Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < 243f71ed873ff3feeb6f9b5cb145d63f7188b4c4Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < 063a6f22478ef929625000a2caf54667725c1dfdLinux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < d75ec4504a4340b033b15cad0303988b3089dd93Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < 8dff54fe88c0dcd4c55bff9fc2fa6ca968290826Linux >= 2f425878b6a71571341dcd3f9e9d1a6f6355da9c < f9c206cdc4266caad6a9a7f46341420a10f03ccbLinux 2.6.30Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99284Nonenet: skbuff: propagate shared-frag marker in skb_zerocopy()
CVE-2026-99283Nonenetfilter: conntrack: tcp: use UNACK timeout for non-closing RST packets
CVE-2026-99272Nonesmb: client: validate the data area in SMB2_read()
CVE-2026-99271NoneALSA: line6: Clear prev_fbuf on capture buffer release
CVE-2026-99273Noneksmbd: reserve space for the UTF-16 terminator in stream info
CVE-2026-99275Nonesmb: client: reject short SESSION_SETUP responses