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CVE-2026-53189

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-53189

Key Details

CVECVE-2026-53189
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-16
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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(). (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-53189
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-53189

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