Review reviewHigh

CVE-2025-40277

Linux

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE This data originates from userspace and is used in buffer offset calculations which could potentially overflow causing an out-of-bounds access.

CVSS: 7.8
EPSS: -
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 probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < e58559845021c3bad5e094219378b869157fad53, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < 54d458b244893e47bda52ec3943fdfbc8d7d068b, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < 709e5c088f9c99a5cf2c1d1c6ce58f2cca7ab173, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < a3abb54c27b2c393c44362399777ad2f6e1ff17e, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < b5df9e06eed3df6a4f5c6f8453013b0cabb927b4, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < 5aea2cde03d4247cdcf53f9ab7d0747c9dca1cfc, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < f3f3a8eb3f0ba799fae057091d8c67cca12d6fa0, >= 8ce75f8ab9044fe11caaaf2b2c82471023212f9f < 32b415a9dc2c212e809b7ebc2b14bc3fbda2b9af, >= 4.3
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
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
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:H/A:H
CWE: Not available