CVE-2026-53189

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 84b3212b166b446faea27ebebb7161405ffceef9affected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 108963978a681c0c468d279cac2b930c27672877affected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 459771c9cf30f378bdbd30fc65d17f7eb931bb59affected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < ae9d4caf6f133e884cf5fcda4982c493b35e5194affected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 6c29a8ba084e89499ca77b947e07ae817f9c16ceaffected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 5f5b604e1e6bde4e889199168ee80fe8306d06adaffected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < ed5b030931292c94133437ac5e5ff580e498eabdaffected
LinuxLinuxfadae2953072e9005c5f1d64e1049edb043494dc < 8d878059924f12c1bc24556a92ec56add74de3c8affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.10.259 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References