CVE-2026-53189
Published: June 27, 2026Last modified: June 27, 2026
Description
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().
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.175-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.92-r0) | |
| Stream | linux-lts | Vulnerable (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877
- https://git.kernel.org/stable/c/459771c9cf30f378bdbd30fc65d17f7eb931bb59
- https://git.kernel.org/stable/c/5f5b604e1e6bde4e889199168ee80fe8306d06ad
- https://git.kernel.org/stable/c/6c29a8ba084e89499ca77b947e07ae817f9c16ce
- https://git.kernel.org/stable/c/84b3212b166b446faea27ebebb7161405ffceef9
- https://git.kernel.org/stable/c/8d878059924f12c1bc24556a92ec56add74de3c8
- https://git.kernel.org/stable/c/ae9d4caf6f133e884cf5fcda4982c493b35e5194
- https://git.kernel.org/stable/c/ed5b030931292c94133437ac5e5ff580e498eabd