CVE-2025-38306
In the Linux kernel, the following vulnerability has been resolved:
fs/fhandle.c: fix a race in call of has_locked_children()
may_decode_fh() is calling has_locked_children() while holding no locks. That's an oopsable race...
The rest of the callers are safe since they are holding namespace_sem and are guaranteed a positive refcount on the mount in question.
Rename the current has_locked_children() to __has_locked_children(), make it static and switch the fs/namespace.c users to it.
Make has_locked_children() a wrapper for __has_locked_children(), calling the latter under read_seqlock_excl(&mount_lock).
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 6.11 | 6.12.46 |
| linux / linux_kernel | 6.13 | 6.15.3 |
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