High 7.8Published Jun 25, 2026

CVE-2026-53189mm/huge_memory: update file PMD counter before folio_put()

Updated under an hour ago (Oct 26, 2026, 5:00 PM ET)

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Exploited in the last 30 days

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: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from fadae2953072e9005c5f1d64e1049edb043494dc before 84b3212b166b446faea27ebebb7161405ffceef9; from fadae2953072e9005c5f1d64e1049edb043494dc before 108963978a681c0c468d279cac2b930c27672877; from fadae2953072e9005c5f1d64e1049edb043494dc before 459771c9cf30f378bdbd30fc65d17f7eb931bb59; from fadae2953072e9005c5f1d64e1049edb043494dc before ae9d4caf6f133e884cf5fcda4982c493b35e5194; from fadae2953072e9005c5f1d64e1049edb043494dc before 6c29a8ba084e89499ca77b947e07ae817f9c16ce; from fadae2953072e9005c5f1d64e1049edb043494dc before 5f5b604e1e6bde4e889199168ee80fe8306d06ad; from fadae2953072e9005c5f1d64e1049edb043494dc before ed5b030931292c94133437ac5e5ff580e498eabd; from fadae2953072e9005c5f1d64e1049edb043494dc before 8d878059924f12c1bc24556a92ec56add74de3c8	CNA record
linux linux_kernel linux:linux_kernel	from 4.19 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 5 more ranges	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.