CVE-2026-99145
drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change
Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change Pinned bos have their pages removed from the shrinker's shrinkable / purgeable counts on pin, and added back on unpin according to the bo's purgeable state at that time. However, xe_bo_set_purgeable_shrinker() unconditionally transfers pages between the shrinkable and purgeable counts. If the purgeable state of a pinned bo changes, for example by userspace madvising DONTNEED on a VMA of a bo that is also pinned as a scanout buffer, this underflows one count and, after unpin, leaves the other one permanently inflated. Only update the purgeable flag for pinned bos, and leave the page accounting to unpin. (cherry picked from commit afe6bc012034123fd838328668e609bf57e46bd3)
INFO
Published Date :
Oct. 28, 2026, 11:17 a.m.
Last Modified :
Oct. 28, 2026, 11:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the patch to the Linux kernel.
- Review memory management logic for pinned buffers.
- Test purgeable state changes on pinned buffers.
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-2026-99145.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/135e998dd1e66b8854db7bd356b6563baf8b9d51 | |
| https://git.kernel.org/stable/c/ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-99145 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-2026-99145
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-2026-99145 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-99145 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.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 28, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: drm/xe: Don't transfer shrinker pages for pinned bos on purgeable state change Pinned bos have their pages removed from the shrinker's shrinkable / purgeable counts on pin, and added back on unpin according to the bo's purgeable state at that time. However, xe_bo_set_purgeable_shrinker() unconditionally transfers pages between the shrinkable and purgeable counts. If the purgeable state of a pinned bo changes, for example by userspace madvising DONTNEED on a VMA of a bo that is also pinned as a scanout buffer, this underflows one count and, after unpin, leaves the other one permanently inflated. Only update the purgeable flag for pinned bos, and leave the page accounting to unpin. (cherry picked from commit afe6bc012034123fd838328668e609bf57e46bd3) Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/99xxx/CVE-2026-99145.json">CVE-2026-99145</a> Added Reference https://git.kernel.org/stable/c/135e998dd1e66b8854db7bd356b6563baf8b9d51 Added Reference https://git.kernel.org/stable/c/ffbfd3f98f4393e91dffce3a46ccb7cf5329cf2f