7.8 High

CVE-2025-38058 In the Linux kernel, the following vulnerability has been resolved: __legitimize_mnt(): check for MNT_SYNC_UMOUNT should…

Description

In the Linux kernel, the following vulnerability has been resolved: __legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock ... or we risk stealing final mntput from sync umount - raising mnt_count after umount(2) has verified that victim is not busy, but before it has set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see that it's safe to quietly undo mnt_count increment and leaves dropping the reference to caller, where it'll be a full-blown mntput(). Check under mount_lock is needed; leaving the current one done before taking that makes no sense - it's nowhere near common enough to bother with.

Affected products and versions

Product	Affected versions	Fixed in
Linux 6.15	earliest → < 6.15	6.15
Linux 6.14	earliest → < 6.14.9	6.14.9
Linux 6.12	earliest → < 6.12.31	6.12.31
Linux 6.6	earliest → < 6.6.93	6.6.93
Linux 6.1	earliest → < 6.1.141	6.1.141
Linux 5.15	earliest → < 5.15.185	5.15.185
Linux 5.10	earliest → < 5.10.238	5.10.238
Linux 5.4	earliest → < 5.4.294	5.4.294
Linux	3.13	No fix stated

Show the 3 other branches

Product	Affected versions	Fixed in
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