Answer in brief
CVE-2022-48991 records a High severity (CVSS 8.8) vulnerability in mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <275c626c131cfe141beeb6c575e31fa53d32da19 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <c23105673228c349739e958fa33955ed8faddcaf || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <5ffc2a75534d9d74d49760f983f8eb675fa63d69 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <7f445ca2e0e59c7971d0b7b853465e50844ab596 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <5450535901d89a5dcca5fbbc59a24fe89caeb465 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <f268f6cf875f3220afc77bdd0bf1bb136eb54db9 | 275c626c131cfe141beeb6c575e31fa53d32da19, c23105673228c349739e958fa33955ed8faddcaf, ff2a1a6f869650aec99e9d070b5ab625bfbc5bc3, 5ffc2a75534d9d74d49760f983f8eb675fa63d69, 7f445ca2e0e59c7971d0b7b853465e50844ab596, 1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3, 5450535901d89a5dcca5fbbc59a24fe89caeb465, f268f6cf875f3220afc77bdd0bf1bb136eb54db9 |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
Oct 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.