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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00031.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
8a1cc07578bf42d85f008316873d710ff684dd29 affected < 8355eea2a2e9c323021dfdcb95d7767d382123c4
8a1cc07578bf42d85f008316873d710ff684dd29 affected < 7a12f9c96d06b145562f76ffb20369b4692f0911
8a1cc07578bf42d85f008316873d710ff684dd29 affected < 576c930e5e7dcb937648490611a83f1bf0171048
Linux Linux affected
Version Status Constraints
6.10 affected —
0 unaffected < 6.10
6.12.64 unaffected ≤ 6.12.*
6.17.9 unaffected ≤ 6.17.*
6.18 unaffected ≤ *

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories
Source ID Title
Debian DSA Debian DSA DSA-6126-1 linux security update
Ubuntu USN Ubuntu USN USN-8029-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8030-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-8029-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8048-1 Linux kernel (OEM) vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/576c930e5e7dcb937648490611a83f1bf0171048 cve-icon cve-icon
https://git.kernel.org/stable/c/7a12f9c96d06b145562f76ffb20369b4692f0911 cve-icon cve-icon
https://git.kernel.org/stable/c/8355eea2a2e9c323021dfdcb95d7767d382123c4 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120717-CVE-2025-40276-6558@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40276 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40276 cve-icon
History

Thu, 08 Jan 2026 10:00:00 +0000

Type Values Removed Values Added
References

Tue, 09 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Sat, 06 Dec 2025 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title drm/panthor: Flush shmem writes before mapping buffers CPU-uncached
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-08T09:50:20.169Z

Reserved: 2025-04-16T07:20:57.184Z

Link: CVE-2025-40276

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-06T22:15:55.433

Modified: 2026-01-08T10:15:49.580

Link: CVE-2025-40276

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-06T00:00:00Z

Links: CVE-2025-40276 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.