Bug 2419894 (CVE-2025-40276) - CVE-2025-40276 kernel: drm/panthor: Flush shmem writes before mapping buffers CPU-uncached
Summary: CVE-2025-40276 kernel: drm/panthor: Flush shmem writes before mapping buffers...
Keywords:
Status: NEW
Alias: CVE-2025-40276
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-08 07:06 UTC by OSIDB Bzimport
Modified: 2025-12-19 12:59 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-12-08 07:06:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/panthor: Flush shmem writes before mapping buffers CPU-uncached

The shmem layer zeroes out the new pages using cached mappings, and if
we don't CPU-flush we might leave dirty cachelines behind, leading to
potential data leaks and/or asynchronous buffer corruption when dirty
cachelines are evicted.
Comment 1 Jon Moroney 2025-12-08 22:06:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120717-CVE-2025-40276-6558@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.