CVE-2026-53189
HIGH severity · CVSS 7.8
7.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: update file PMD counter before folio_put() __split_huge_pmd_locked() updates the file/shmem RSS counter after dropping the PMD mapping's folio reference. If folio_put() drops the last reference, mm_counter_file() can later read freed folio state via folio_test_swapbacked(). Move the counter update before folio_put().
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877Patch
- https://git.kernel.org/stable/c/459771c9cf30f378bdbd30fc65d17f7eb931bb59Patch
- https://git.kernel.org/stable/c/5f5b604e1e6bde4e889199168ee80fe8306d06adPatch
- https://git.kernel.org/stable/c/6c29a8ba084e89499ca77b947e07ae817f9c16cePatch
- https://git.kernel.org/stable/c/84b3212b166b446faea27ebebb7161405ffceef9Patch
- https://git.kernel.org/stable/c/8d878059924f12c1bc24556a92ec56add74de3c8Patch
- https://git.kernel.org/stable/c/ae9d4caf6f133e884cf5fcda4982c493b35e5194Patch
- https://git.kernel.org/stable/c/ed5b030931292c94133437ac5e5ff580e498eabdPatch