mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 17 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
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 security impact of this only came in commit 27e1f8273113 ("khugepaged: enable collapse pmd for pte-mapped THP"), which actually omitted flushes for the removal of present PTEs, not just for the removal of empty page tables.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://git.kernel.org/stable/c/275c626c131cfe141beeb6c575e31fa53d32da19
- https://git.kernel.org/stable/c/c23105673228c349739e958fa33955ed8faddcaf
- https://git.kernel.org/stable/c/ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3
- https://git.kernel.org/stable/c/5ffc2a75534d9d74d49760f983f8eb675fa63d69
- https://git.kernel.org/stable/c/7f445ca2e0e59c7971d0b7b853465e50844ab596
- https://git.kernel.org/stable/c/1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3
- https://git.kernel.org/stable/c/5450535901d89a5dcca5fbbc59a24fe89caeb465
- https://git.kernel.org/stable/c/f268f6cf875f3220afc77bdd0bf1bb136eb54db9
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2022-53870
- GCVE · GCVE-0-2022-48991
CERT-FR advisories
- CERTFR-2025-AVI-0024 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1102 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1048 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1033 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0999 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.8 < 4.9.337cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.10 < 4.14.303cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.270cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.227cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.159cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.83cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.0.13cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 275c626c131cfe141beeb6c575e31fa53d32da19 ; affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < c23105673228c349739e958fa33955ed8faddcaf ; affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3 ; affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 5ffc2a75534d9d74d49760f983f8eb675fa63d69 ; affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 7f445ca2e0e59c7971d0b7b853465e50844ab596 ; affected f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 < 1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3 |
| Linux · Linux | affected 4.8 ; unaffected 0 < 4.8 ; unaffected 4.9.337 ≤ 4.9.* ; unaffected 4.14.303 ≤ 4.14.* ; unaffected 4.19.270 ≤ 4.19.* ; unaffected 5.4.227 ≤ 5.4.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |