Review reviewHigh

CVE-2025-40276

Linux

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.

CVSS
7.3
EPSS
0.13%
3.34% percentile
CISA KEV
Not listed
Published
2025.12.07
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.3

Vulnerability overview

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.

Affected product and versions

Product
Linux
Affected versions
>= 8a1cc07578bf42d85f008316873d710ff684dd29 < 8355eea2a2e9c323021dfdcb95d7767d382123c4, >= 8a1cc07578bf42d85f008316873d710ff684dd29 < 7a12f9c96d06b145562f76ffb20369b4692f0911, >= 8a1cc07578bf42d85f008316873d710ff684dd29 < 576c930e5e7dcb937648490611a83f1bf0171048, >= 6.10
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE
Not available