Answer in brief
CVE-2023-52935 records a High severity (CVSS 7.8) vulnerability in mm/khugepaged: fix ->anon_vma race. 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 7.8. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <352fbf61ce776fef18dca6a68680a6cd943dac95 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <cee956ab1efbd858b4ca61c8b474af5aa24b29a6 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <abdf3c33918185c3e8ffeb09ed3e334b3d7df47c || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <acb08187b5a83cdb9ac4112fae9e18cf983b0128 || >=f3f0e1d2150b2b99da2cbdfaad000089efe9bf30 <023f47a8250c6bdb4aebe744db4bf7f73414028b | 352fbf61ce776fef18dca6a68680a6cd943dac95, cee956ab1efbd858b4ca61c8b474af5aa24b29a6, abdf3c33918185c3e8ffeb09ed3e334b3d7df47c, acb08187b5a83cdb9ac4112fae9e18cf983b0128, 023f47a8250c6bdb4aebe744db4bf7f73414028b |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
Mar 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: fix ->anon_vma race If an ->anon_vma is attached to the VMA, collapse_and_free_pmd() requires it to be locked. Page table traversal is allowed under any one of the mmap lock, the anon_vma lock (if the VMA is associated with an anon_vma), and the mapping lock (if the VMA is associated with a mapping); and so to be able to remove page tables, we must hold all three of them. retract_page_tables() bails out if an ->anon_vma is attached, but does this check before holding the mmap lock (as the comment above the check explains). If we racily merged an existing ->anon_vma (shared with a child process) from a neighboring VMA, subsequent rmap traversals on pages belonging to the child will be able to see the page tables that we are concurrently removing while assuming that nothing else can access them. Repeat the ->anon_vma check once we hold the mmap lock to ensure that there really is no concurrent page table access. Hitting this bug causes a lockdep warning in collapse_and_free_pmd(), in the line "lockdep_assert_held_write(&vma->anon_vma->root->rwsem)". It can also lead to use-after-free access.
Quoted source text, attributed separately from HOL analysis.