CVE-2026-46093
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7679ba6b36dbb300b757b672d6a32a606499e14b < 687ccdf582169cd680aeaf24cc953807c4cd4345 | affected |
| Linux | Linux | 7679ba6b36dbb300b757b672d6a32a606499e14b < 12f2341b4c235d5593a433abac201c1c6725787f | affected |
| Linux | Linux | 7679ba6b36dbb300b757b672d6a32a606499e14b < ec05f51f1e65bce95528543eb73fda56fd201d94 | affected |
| Linux | Linux | 6.9 | affected |
| Linux | Linux | 0 < 6.9 | unaffected |
| Linux | Linux | 6.18.27 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.4 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/687ccdf582169cd680aeaf24cc953807c4cd4345
- https://git.kernel.org/stable/c/12f2341b4c235d5593a433abac201c1c6725787f
- https://git.kernel.org/stable/c/ec05f51f1e65bce95528543eb73fda56fd201d94
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