GPU DDK - Insufficient permission check in PhysmemWrapExtMem() when write attribute support enabled
Priority LOW 19CWE-280Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00137 3rd percentileScored 2026-11-07
Fix Fixed Graphics DDK (Imagination Technologies): 25.2 RTM, 26.1 RTM
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Imagination Technologies | Graphics DDK | 1.17 RTM; 1.18 RTM; 23.2 RTM; 24.1 RTM – 25.1 RTM | 25.2 RTM, 26.1 RTM | Patch available | CNA |
- Graphics DDK VendorImagination Technologies Affected 1.17 RTM; 1.18 RTM; 23.2 RTM; 24.1 RTM – 25.1 RTM Fixed in 25.2 RTM, 26.1 RTM Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:imaginationtech:ddk:25.1:-:*:*:*:*:*:* | 25.1 | Vulnerable | Imagination Technologies |
| cpe:2.3:a:imaginationtech:ddk:25.1:rtm2:*:*:*:*:*:* | 25.1 rtm2 | Vulnerable | Imagination Technologies |
- cpe:2.3:a:imaginationtech:ddk:25.1:-:*:*:*:*:*:* Versions 25.1 Vulnerable ·Imagination Technologies
- cpe:2.3:a:imaginationtech:ddk:25.1:rtm2:*:*:*:*:*:* Versions 25.1 rtm2 Vulnerable ·Imagination Technologies
Remediation
- Fix · CNA Graphics DDK (Imagination Technologies) Fixed in 25.2 RTM, 26.1 RTM
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21736
- 2026-10-03 Alias added: GHSA-vjrg-fwqx-82jx
References
More Imagination Technologies Ddk vulnerabilities
- TI-2023-04574 GPU kernel implementations susceptible to memory leak CVSS 3.1MEDIUM 6.5
- TI-2026-13612 GPU DDK - Integer overflow in _PMRLogicalOffsetToPhysicalOffset CVSS 3.1CRITICAL 9.8
- TI-2025-12749 GPU DDK - libusc UAF via WebGPU shaders at MergeConsecutiveBarriersBP CVSS 3.1CRITICAL 9.8
- TI-2025-18845 GPU DDK - GPU Register value contents leaked from secure workloads to non-secure world CVSS 3.1CRITICAL 9.1
- TI-2026-17504 GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation CVSS 3.1CRITICAL 9.6
- TI-2026-17506 GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation CVSS 3.1HIGH 7.7
Sources
- CVE-2026-21736 · CVE Program
- CVE-2026-21736 · NVD
- FIRST EPSS
- GHSA-vjrg-fwqx-82jx · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences