Critical 9.8Published Sep 4, 2025

CVE-2025-38724nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

Updated under an hour ago (Oct 27, 2026, 10:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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().

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before 3f252a73e81aa01660cb426735eab932e6182e8d; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before d35ac850410966010e92f401f4e21868a9ea4d8b; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before f3aac6cf390d8b80e1d82975faf4ac61175519c0; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before 22f45cedf281e6171817c8a3432c44d788c550e1; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before d71abd1ae4e0413707cd42b10c24a11d1aa71772; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before 74ad36ed60df561a303a19ecef400c7096b20306; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before 36e83eda90e0e4ac52f259f775b40b2841f8a0a3; from d20c11d86d8f821a64eac7d6c8f296f06d935f4f before 571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1; and 1 more ranges	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.17 before 5.4.297; from 5.5 before 5.10.241; from 5.11 before 5.15.190; from 5.16 before 6.1.149; from 6.2 before 6.6.103; from 6.7 before 6.12.43; from 6.13 before 6.15.11; from 6.16 before 6.16.2	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/3f252a73e81aa01660cb426735eab932e6182e8d	patch
https://git.kernel.org/stable/c/d35ac850410966010e92f401f4e21868a9ea4d8b	patch
https://git.kernel.org/stable/c/f3aac6cf390d8b80e1d82975faf4ac61175519c0	patch
https://git.kernel.org/stable/c/22f45cedf281e6171817c8a3432c44d788c550e1	patch
https://git.kernel.org/stable/c/d71abd1ae4e0413707cd42b10c24a11d1aa71772	patch
https://git.kernel.org/stable/c/74ad36ed60df561a303a19ecef400c7096b20306	patch
https://git.kernel.org/stable/c/36e83eda90e0e4ac52f259f775b40b2841f8a0a3	patch
https://git.kernel.org/stable/c/571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1	patch
https://git.kernel.org/stable/c/908e4ead7f757504d8b345452730636e298cbf68	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	mailing-list, third-party-advisory
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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.