nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38724
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-04 16:15:42 UTC
Updated2026-05-12 13:17:02 UTC
DescriptionIn 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().

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 3f252a73e81aa01660cb426735eab932e6182e8d git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f d35ac850410966010e92f401f4e21868a9ea4d8b git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f f3aac6cf390d8b80e1d82975faf4ac61175519c0 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 22f45cedf281e6171817c8a3432c44d788c550e1 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f d71abd1ae4e0413707cd42b10c24a11d1aa71772 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 74ad36ed60df561a303a19ecef400c7096b20306 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 36e83eda90e0e4ac52f259f775b40b2841f8a0a3 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1 git Not specified
CNA Linux Linux affected d20c11d86d8f821a64eac7d6c8f296f06d935f4f 908e4ead7f757504d8b345452730636e298cbf68 git Not specified
CNA Linux Linux affected 3.17 Not specified
CNA Linux Linux unaffected 3.17 semver Not specified
CNA Linux Linux unaffected 5.4.297 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.241 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.149 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.103 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.43 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.11 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16.2 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/3f252a73e81aa01660cb426735eab932e6182e8d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d35ac850410966010e92f401f4e21868a9ea4d8b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/36e83eda90e0e4ac52f259f775b40b2841f8a0a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d71abd1ae4e0413707cd42b10c24a11d1aa71772 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/908e4ead7f757504d8b345452730636e298cbf68 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/571a5e46c71490285d2d8c06f6b5a7cbf6c7edd1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/74ad36ed60df561a303a19ecef400c7096b20306 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f3aac6cf390d8b80e1d82975faf4ac61175519c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/22f45cedf281e6171817c8a3432c44d788c550e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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