by Kastro
Paper/Archive/CVE-2025-38724

CVE-2025-38724

Linux Linux — nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
36
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 33.1.331 × 206.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() Lei Lu recently reported that nfsd4_setclientid_confirm() did not check the return value from get_client_locked(). a SETCLIENTID_CONFIRM could race with a confirmed client expiring and fail to get a reference. That could later lead to a UAF. Fix this by getting a reference early in the case where there is an extant confirmed client. If that fails then treat it as if there were no confirmed client found at all. In the case where the unconfirmed client is expiring, just fail and return the result from get_client_locked().

Affected

ProductAffectedFixed inSource
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 3f252a73e81aa01660cb426735eab932e6182e8d3f252a73e81aa01660cb426735eab932e6182e8dCNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < d35ac850410966010e92f401f4e21868a9ea4d8bd35ac850410966010e92f401f4e21868a9ea4d8bCNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < f3aac6cf390d8b80e1d82975faf4ac61175519c0f3aac6cf390d8b80e1d82975faf4ac61175519c0CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 22f45cedf281e6171817c8a3432c44d788c550e122f45cedf281e6171817c8a3432c44d788c550e1CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < d71abd1ae4e0413707cd42b10c24a11d1aa71772d71abd1ae4e0413707cd42b10c24a11d1aa71772CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 74ad36ed60df561a303a19ecef400c7096b2030674ad36ed60df561a303a19ecef400c7096b20306CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 36e83eda90e0e4ac52f259f775b40b2841f8a0a336e83eda90e0e4ac52f259f775b40b2841f8a0a3CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1CNA
Linuxd20c11d86d8f821a64eac7d6c8f296f06d935f4f – < 908e4ead7f757504d8b345452730636e298cbf68908e4ead7f757504d8b345452730636e298cbf68CNA
Linux3.17–CNA
SIMATIC CN 4100< V5.0V5.0siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFPV3.1.5–siemens-SADP

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgit.kernel.org/stable/c/3f252a73e81aa01660cb426735eab932e6182e8drefgit.kernel.org/stable/c/d35ac850410966010e92f401f4e21868a9ea4d8brefgit.kernel.org/stable/c/f3aac6cf390d8b80e1d82975faf4ac61175519c0refgit.kernel.org/stable/c/22f45cedf281e6171817c8a3432c44d788c550e1refgit.kernel.org/stable/c/d71abd1ae4e0413707cd42b10c24a11d1aa71772refgit.kernel.org/stable/c/74ad36ed60df561a303a19ecef400c7096b20306refgit.kernel.org/stable/c/36e83eda90e0e4ac52f259f775b40b2841f8a0a3refgit.kernel.org/stable/c/571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1refgit.kernel.org/stable/c/908e4ead7f757504d8b345452730636e298cbf68reflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlreflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlrefcert-portal.siemens.com/productcert/html/ssa-082556.htmlrefcert-portal.siemens.com/productcert/html/ssa-032379.html