mm/huge_memory: update file PMD counter before folio_put()
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
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
Linux · LinuxReferences
https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877https://git.kernel.org/stable/c/459771c9cf30f378bdbd30fc65d17f7eb931bb59https://git.kernel.org/stable/c/5f5b604e1e6bde4e889199168ee80fe8306d06adhttps://git.kernel.org/stable/c/6c29a8ba084e89499ca77b947e07ae817f9c16cehttps://git.kernel.org/stable/c/84b3212b166b446faea27ebebb7161405ffceef9https://git.kernel.org/stable/c/8d878059924f12c1bc24556a92ec56add74de3c8https://git.kernel.org/stable/c/ae9d4caf6f133e884cf5fcda4982c493b35e5194https://git.kernel.org/stable/c/ed5b030931292c94133437ac5e5ff580e498eabd