9.8 Critical

CVE-2025-38724 In the Linux kernel, the following vulnerability has been resolved: nfsd: handle get_client_locked() failure in…

Description

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 and versions

Product	Affected versions	Fixed in
Linux 6.17	earliest → < 6.17	6.17
Linux 6.16	earliest → < 6.16.2	6.16.2
Linux 6.15	earliest → < 6.15.11	6.15.11
Linux 6.12	earliest → < 6.12.43	6.12.43
Linux 6.6	earliest → < 6.6.103	6.6.103
Linux 6.1	earliest → < 6.1.149	6.1.149
Linux 5.15	earliest → < 5.15.190	5.15.190
Linux 5.10	earliest → < 5.10.241	5.10.241
Linux 5.4	earliest → < 5.4.297	5.4.297

Show the 5 other branches

Product	Affected versions	Fixed in
Linux	3.17	No fix stated
SIMATIC CN 4100 5.0	earliest → < 5.0	5.0
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.5 → latest	No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.5 → latest	No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.5 → latest	No fix stated