Answer in brief
CVE-2025-39910 records a Medium severity (CVSS 5.5) vulnerability in mm/vmalloc, mm/kasan: respect gfp mask in kasan_populate_vmalloc(). 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 5.5. 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 | >=451769ebb7e792c3404db53b3c2a422990de654e <9598c83a50a5f9d57fd0c12fc08d9425c1ce9537 || >=451769ebb7e792c3404db53b3c2a422990de654e <aa1b4b7a1b92743297f9da741424df4703a8e11b || >=451769ebb7e792c3404db53b3c2a422990de654e <33b95d90427cb4babf32059e323a6d0c027610fe || >=451769ebb7e792c3404db53b3c2a422990de654e <79357cd06d41d0f5a11b17d7c86176e395d10ef2 | 9598c83a50a5f9d57fd0c12fc08d9425c1ce9537, aa1b4b7a1b92743297f9da741424df4703a8e11b, 33b95d90427cb4babf32059e323a6d0c027610fe, 79357cd06d41d0f5a11b17d7c86176e395d10ef2 |
| Linux/Linuxgeneric | 5.17 | Not reported |
Published upstream
Oct 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 21, 2026
In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc, mm/kasan: respect gfp mask in kasan_populate_vmalloc() kasan_populate_vmalloc() and its helpers ignore the caller's gfp_mask and always allocate memory using the hardcoded GFP_KERNEL flag. This makes them inconsistent with vmalloc(), which was recently extended to support GFP_NOFS and GFP_NOIO allocations. Page table allocations performed during shadow population also ignore the external gfp_mask. To preserve the intended semantics of GFP_NOFS and GFP_NOIO, wrap the apply_to_page_range() calls into the appropriate memalloc scope. xfs calls vmalloc with GFP_NOFS, so this bug could lead to deadlock. There was a report here https://lkml.kernel.org/r/[email protected] This patch: - Extends kasan_populate_vmalloc() and helpers to take gfp_mask; - Passes gfp_mask down to alloc_pages_bulk() and __get_free_page(); - Enforces GFP_NOFS/NOIO semantics with memalloc_*_save()/restore() around apply_to_page_range(); - Updates vmalloc.c and percpu allocator call sites accordingly.
Quoted source text, attributed separately from HOL analysis.