CVE-2026-46093 mm/vmalloc: take vmap_purge_lock in shrinker

What is CVE-2026-46093?

CVE-2026-46093 is a high-severity vulnerability in Linux kernel, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2026-46093?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46093?

Apply the vendor's patch.

Is CVE-2026-46093 being exploited?

There is no known exploitation of CVE-2026-46093 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-46093, DEBIAN-CVE-2026-46093, GHSA-vf24-gv7c-563r, ROOT-OS-DEBIAN-13-CVE-2026-46093, UBUNTU-CVE-2026-46093.