CVE-2026-53189

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

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

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-06-25

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

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

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