mm/vmalloc, mm/kasan: respect gfp mask in kasan_populate_vmalloc()
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/686ea951.050a0220.385921.0016.GAE@google.com 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.
CVE-2025-39910
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-39910
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "451769ebb7e792c3404db53b3c2a422990de654e",
"lessThan": "9598c83a50a5f9d57fd0c12fc08d9425c1ce9537",
"versionType": "git"
},
{
"status": "affected",
"version": "451769ebb7e792c3404db53b3c2a422990de654e",
"lessThan": "aa1b4b7a1b92743297f9da741424df4703a8e11b",
"versionType": "git"
},
{
"status": "affected",
"version": "451769ebb7e792c3404db53b3c2a422990de654e",
"lessThan": "33b95d90427cb4babf32059e323a6d0c027610fe",
"versionType": "git"
},
{
"status": "affected",
"version": "451769ebb7e792c3404db53b3c2a422990de654e",
"lessThan": "79357cd06d41d0f5a11b17d7c86176e395d10ef2",
"versionType": "git"
}
],
"programFiles": [
"include/linux/kasan.h",
"mm/kasan/shadow.c",
"mm/vmalloc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.16.8",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/kasan.h",
"mm/kasan/shadow.c",
"mm/vmalloc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39910
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46029 · Revision 1
- Added to Heist Feed
- Publisher date