CVE-2022-48991

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths Any codepath that zaps page table entries must invoke MMU notifiers to ensure that secondary MMUs (like KVM) don't keep accessing pages which aren't mapped anymore. Secondary MMUs don't hold their own references to pages that are mirrored over, so failing to notify them can lead to page use-after-free. I'm marking this as addressing an issue introduced in commit f3f0e1d2150b ("khugepaged: add support of collapse for tmpfs/shmem pages"), but most of the securit...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 275c626c131cfe141beeb6c575e31fa53d32da19, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < c23105673228c349739e958fa33955ed8faddcaf, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 5ffc2a75534d9d74d49760f983f8eb675fa63d69, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 7f445ca2e0e59c7971d0b7b853465e50844ab596, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 5450535901d89a5dcca5fbbc59a24fe89caeb465, >= f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < f268f6cf875f3220afc77bdd0bf1bb136eb54db9, >= 4.8, >= 4.8 < 4.9.337, >= 4.10 < 4.14.303, >= 4.15 < 4.19.270, >= 4.20 < 5.4.227, >= 5.5 < 5.10.159, >= 5.11 < 5.15.83, >= 5.16 < 6.0.13, 6.1

Fixed versions

4.9.337, 4.14.303, 4.19.270, 5.4.227, 5.10.159, 5.15.83, 6.0.13

Technical data

CVSS vector

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

CWE

CWE-416