CVE-2026-46093
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
mm/vmalloc: take vmap_purge_lock in shrinker
decay_va_pool_node() can be invoked concurrently from two paths:
__purge_vmap_area_lazy() when pools are being purged, and the shrinker via
vmap_node_shrink_scan().
However, decay_va_pool_node() is not safe to run concurrently, and the
shrinker path currently lacks serialization, leading to races and possible
leaks.
Protect decay_va_pool_node() by taking vmap_purge_lock in the shrinker
path to ensure serialization with purge users.
https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f
https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345
https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94