CVE-2026-46093

7.8 HIGH

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: take vmap_purge_lock in shrinker decay_va_pool_node() c...

Published: 2026-05-27 · Last updated: 2026-05-30

Severity and scoring

CVSS: 7.8 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-46093
[Other]https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f
[Other]https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345
[Other]https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94