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CVE-2026-65587— GPU DDK - OOB write in CalculateNPOTTwiddleSparsePageMap via TEXTURE_BASE_LEVEL change

Quick assessment

Affected
Imagination Technologies Graphics DDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

一个包含非标准 WebGPU 内容的网页，若被加载至 GPU 的 GLES 渲染进程中，可能触发 GPU 用户空间驱动程序中的越界写入（OOB write），进而导致内存损坏，并可能引发浏览器或 GPU 进程崩溃。 该软件将数据写入到预期内存偏移量之后的位置。在已分配内存边界之外进行写入，可能破坏相邻内存区域，导致进程崩溃，或引发未定义行为。

AI Predicted 8.8 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-65587

Vulnerability Information
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Vulnerability Title
GPU DDK - OOB write in CalculateNPOTTwiddleSparsePageMap via TEXTURE_BASE_LEVEL change
Source: CVE Program / CVE List V5
Vulnerability Description
A web page that contains unusual WebGPU content loaded into the GPU GLES render process can trigger an OOB write in the GPU user-space driver, leading to memory corruption and possible browser/GPU process crash. The software writes data past the end of an intended memory offset. Writing outside the bounds of allocated memory can corrupt adjacent memory, crash the process, or cause undefined behaviour.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Imagination Technologies Graphics DDK 1.18 RTM2 -

II. Public POCs for CVE-2026-65587

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III. Intelligence Information for CVE-2026-65587

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News Coverage for CVE-2026-65587 (1)

Same Patch Batch · Imagination Technologies · 2026-10-30 · 8 CVEs total

CVE-2026-65584 GPU DDK - Stack Buffer Overflow via undersized UFO address array in DumpStalledContextInfo
CVE-2026-15466 GPU DDK - Write UAF due to a race condition caused by insufficient locking in PVRSRVRGXClo
CVE-2026-65586 GPU DDK - Write UAF due to missing cleanup reference for abort command submitted via PVRSR
CVE-2026-74912 GPU DDK - Fix for CVE-2026-49746 prevents the mapping of graphics buffers > 4GB
CVE-2026-74915 GPU DDK - OOB write in UntwiddlePOTSquare64bpp
CVE-2026-19199 GPU DDK - OOB write due to freelist size integer overflow in RGXCreateHWRTDataSet
CVE-2026-18629 GPU DDK - libusc.so NPD due to integer overflow at ConvertSwitchToArrayLookup during WebGP

IV. Related Vulnerabilities

Same product: Graphics DDK
Same vendor: Imagination Technologies
Same weakness: CWE-787