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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-30 | Assigner Linux




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

Product status

Default status
unaffected

7679ba6b36dbb300b757b672d6a32a606499e14b (git) before 687ccdf582169cd680aeaf24cc953807c4cd4345
affected

7679ba6b36dbb300b757b672d6a32a606499e14b (git) before 12f2341b4c235d5593a433abac201c1c6725787f
affected

7679ba6b36dbb300b757b672d6a32a606499e14b (git) before ec05f51f1e65bce95528543eb73fda56fd201d94
affected

Default status
affected

6.9
affected

Any version before 6.9
unaffected

6.18.27 (semver)
unaffected

7.0.4 (semver)
unaffected

7.1-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/687ccdf582169cd680aeaf24cc953807c4cd4345

git.kernel.org/...c/12f2341b4c235d5593a433abac201c1c6725787f

git.kernel.org/...c/ec05f51f1e65bce95528543eb73fda56fd201d94

cve.org (CVE-2026-46093)

nvd.nist.gov (CVE-2026-46093)

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