CVE-2026-21736: GPU DDK - Insufficient permission check in PhysmemWrapExtMem() when write attribute support enabled

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory. This is caused by improper handling of the memory protections for the user-mode wrapped memory resource.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.1% · higher than 3% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

GD

Graphics DDK · Imagination Technologies

1.17 RTM; 1.18 RTM; 23.2 RTM; 24.1 RTM through 25.1 RTM · source: vendor

DD

Ddk · Imaginationtech

25.1; 25.1 · source: NVD