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critical9.8

CVE-2025-38724

In the Linux kernel, the following vulnerability has been resolved: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() Lei Lu recently rep…

Impact

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 products

VendorProductAffected versions
LinuxLinux 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
DebianDebian Linux
Version 11.0

Weakness classification

CWE-416

References