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Vulnerability record · CVE-2026-53189 · published 25 June 2026

CVE-2026-53189: Linux kernel vulnerability

Linux · Linux Kernel

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().

7.8 CVSS 3.1 High EPSS 0.13% · top 97.9%
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
6 Jul 2026Last modified by NVD

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().

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877 Patch
https://git.kernel.org/stable/c/459771c9cf30f378bdbd30fc65d17f7eb931bb59 Patch
https://git.kernel.org/stable/c/5f5b604e1e6bde4e889199168ee80fe8306d06ad Patch
https://git.kernel.org/stable/c/6c29a8ba084e89499ca77b947e07ae817f9c16ce Patch
https://git.kernel.org/stable/c/84b3212b166b446faea27ebebb7161405ffceef9 Patch
https://git.kernel.org/stable/c/8d878059924f12c1bc24556a92ec56add74de3c8 Patch
https://git.kernel.org/stable/c/ae9d4caf6f133e884cf5fcda4982c493b35e5194 Patch
https://git.kernel.org/stable/c/ed5b030931292c94133437ac5e5ff580e498eabd Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53189), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.