CVE-2025-40336
drm/gpusvm: fix hmm_pfn_to_map_order() usage
Description
In the Linux kernel, the following vulnerability has been resolved: drm/gpusvm: fix hmm_pfn_to_map_order() usage Handle the case where the hmm range partially covers a huge page (like 2M), otherwise we can potentially end up doing something nasty like mapping memory which is outside the range, and maybe not even mapped by the mm. Fix is based on the xe userptr code, which in a future patch will directly use gpusvm, so needs alignment here. v2: - Add kernel-doc (Matt B) - s/fls/ilog2/ (Thomas)
INFO
Published Date :
Dec. 9, 2025, 4:17 p.m.
Last Modified :
Oct. 15, 2026, 10:19 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest version.
- Apply the specific patch for drm/gpusvm.
- Review the xe userptr code for similar issues.
- Ensure proper memory management practices.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-40336.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/08e9fd78ba1b9e95141181c69cc51795c9888157 | |
| https://git.kernel.org/stable/c/c50729c68aaf93611c855752b00e49ce1fdd1558 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-40336 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-40336
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-40336 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-40336 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 15, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/08e9fd78ba1b9e95141181c69cc51795c9888157 Added Reference https://git.kernel.org/stable/c/c50729c68aaf93611c855752b00e49ce1fdd1558 Removed Reference https://git.kernel.org/stable/c/08e9fd78ba1b9e95141181c69cc51795c9888157 Removed Reference https://git.kernel.org/stable/c/c50729c68aaf93611c855752b00e49ce1fdd1558 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 15, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-40336', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-15T21:59:29.236103Z'} -
CVE Translated by [email protected]
Oct. 14, 2026
Action Type Old Value New Value Added Translation Title: Linux, Description: En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: drm/gpusvm: corregir el uso de hmm_pfn_to_map_order() Manejar el caso en que el rango hmm cubre parcialmente una página enorme (como 2M), de lo contrario podemos potencialmente terminar haciendo algo desagradable como mapear memoria que está fuera del rango, y quizás ni siquiera mapeada por el mm. La corrección se basa en el código xe userptr, que en un parche futuro usará directamente gpusvm, por lo que necesita alineación aquí. v2: - Añadir kernel-doc (Matt B) - s/fls/ilog2/ (Thomas) -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '99624bdff8670795b678eafa6509aaad3a5c0175', 'lessThan': '08e9fd78ba1b9e95141181c69cc51795c9888157', 'versionType': 'git'}, {'status': 'affected', 'version': '99624bdff8670795b678eafa6509aaad3a5c0175', 'lessThan': 'c50729c68aaf93611c855752b00e49ce1fdd1558', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/drm_gpusvm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.17.8', 'versionType': 'semver', 'lessThanOrEqual': '6.17.*'}, {'status': 'unaffected', 'version': '6.18', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/drm_gpusvm.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dec. 09, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: drm/gpusvm: fix hmm_pfn_to_map_order() usage Handle the case where the hmm range partially covers a huge page (like 2M), otherwise we can potentially end up doing something nasty like mapping memory which is outside the range, and maybe not even mapped by the mm. Fix is based on the xe userptr code, which in a future patch will directly use gpusvm, so needs alignment here. v2: - Add kernel-doc (Matt B) - s/fls/ilog2/ (Thomas) Added Reference https://git.kernel.org/stable/c/08e9fd78ba1b9e95141181c69cc51795c9888157 Added Reference https://git.kernel.org/stable/c/c50729c68aaf93611c855752b00e49ce1fdd1558