7.8

CVE-2025-38724

nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.17 < 5.4.297
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.241
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.190
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.149
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.103
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.43
Linux ≫ Linux Kernel Version >= 6.13 < 6.15.11
Linux ≫ Linux Kernel Version >= 6.16 < 6.16.2
Debian ≫ Debian Linux Version11.0
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.058
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory
Mailing List
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html