TI-2026-82819 Aliases CVE-2026-18629 GHSA-29cf-2525-q9j7

NULL pointer dereference in Imagination Graphics DDK libusc.so

LOW 38CWE-190Published 2026-10-30 · Updated 2026-11-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

Imagination Graphics DDK versions 23.2 RTM2, 24.2 RTM2, 25.1 RTM2 through 25.3 RTM, and 26.1 RTM1 are affected. An integer overflow (CWE-190) in arithmetic on values derived from shader code leads to incorrect memory size calculations in libusc.so. A web page with unusual GPU shader code can trigger an unhandled allocation failure, so the compiler dereferences a NULL pointer and crashes. On certain platforms where the compiler runs with system privileges, this could enable further exploits.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

A web page that contains unusual GPU shader code is loaded into the GPU compiler process and can lead memory allocation failure. If the allocation failure is not properly handled, the compiler may dereference a NULL pointer at a controlled offset, resulting in a crash of the compiler process. On certain platforms, when the compiler process has system privileges this could lead to crashes or enable further exploits on the device. The weakness results from performing arithmetic operations on values derived from the shader program without properly preventing integer overflow. The overflow can cause incorrect memory size calculations, leading to memory allocation failures and subsequent invalid program behaviour. Integer overflow can produce unexpected values that affect memory allocation and other security-relevant operations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00263 18th percentileScored 2026-11-07

Fix Fixed Graphics DDK (Imagination Technologies): 1.18 RTM2, 26.1 RTM2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
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	23.2 RTM2; 24.2 RTM2; 25.1 RTM2 – 25.3 RTM; 26.1 RTM1	1.18 RTM2, 26.1 RTM2	Patch available	CNA

Graphics DDK VendorImagination Technologies Affected 23.2 RTM2; 24.2 RTM2; 25.1 RTM2 – 25.3 RTM; 26.1 RTM1 Fixed in 1.18 RTM2, 26.1 RTM2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:imaginationtech:ddk::::::::	—	—	Imagination Technologies

cpe:2.3:a:imaginationtech:ddk:*:*:*:*:*:*:*:* Versions — — ·Imagination Technologies

Remediation

Imagination Graphics DDK is fixed in versions 26.1 RTM2 and 1.18 RTM2. The sources list no advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Fix · CNA Graphics DDK (Imagination Technologies) Fixed in 1.18 RTM2, 26.1 RTM2

Timeline

2026-10-30 Threatist record created from CVE-2026-18629
2026-10-30 Alias added: GHSA-29cf-2525-q9j7
2026-11-05 CVSS score added · CISA ADP
2026-11-05 CISA SSVC decision points changed

References

Other 1

https://www.imaginationtech.com/gpu-driver-vulnerabilities/

TI-2023-04574 GPU kernel implementations susceptible to memory leak CVSS 3.1MEDIUM 6.5
TI-2026-82822 Integer truncation in Imagination Graphics DDK limits buffer mapping CVSS 3.1CRITICAL 9.8
TI-2026-29783 GPU DDK - OOB Write in CalculateNPOTTwiddleSparsePageMap3D CVSS 3.1CRITICAL 9.8
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-2025-05971 GPU DDK - RGXFW_CTL.pui8FWScratchBuf Leak/Overwrite CVSS 3.1CRITICAL 9.8

See all 95 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences