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CVE-2026-49743— GPU DDK - Write UAF of sync checkpoint in GPU kick function after export fence file descriptor is prematurely closed

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.

Imagination Technologies Graphics DDK是Imagination Technologies的图形驱动程序开发套件。 Imagination Technologies Graphics DDK 24.2 RTM2版本、25.1 RTM2版本至25.3 RTM版本和26.1 RTM1版本存在资源管理错误漏洞，该漏洞源于GPU系统调用不当，导致内核同步对象引用计数未正确增加，攻击者可通过破坏导出的栅栏并过早释放底层原语，造成释放后重用。

AI Predicted 6.5 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Imagination Technologies Graphics DDK 1.18 RTM2 unaffected
23.2 RTM2 unaffected
24.2 RTM2 affected
25.1 RTM2≤ 25.3 RTM affected
26.1 RTM1 affected
26.1 RTM2 unaffected
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I. Basic Information for CVE-2026-49743

Vulnerability Information
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Vulnerability Title
GPU DDK - Write UAF of sync checkpoint in GPU kick function after export fence file descriptor is prematurely closed
Source: CVE Program / CVE List V5
Vulnerability Description
Software installed and run as a non-privileged user may conduct improper GPU system calls to manipulate the lifetimes of synchronisation objects in the kernel, leading to read/write UAFs. During workload submission involving a fence exported by the GPU driver, the reference count of the underlying synchronisation primitive is not properly incremented. This can be exploited, by destroying the exported fence and prematurely release the underlying primitive, resulting in a potential use-after-free condition.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Imagination Technologies Graphics DDK 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Imagination Technologies Graphics DDK是Imagination Technologies的图形驱动程序开发套件。 Imagination Technologies Graphics DDK 24.2 RTM2版本、25.1 RTM2版本至25.3 RTM版本和26.1 RTM1版本存在资源管理错误漏洞，该漏洞源于GPU系统调用不当，导致内核同步对象引用计数未正确增加，攻击者可通过破坏导出的栅栏并过早释放底层原语，造成释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

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

II. Public POCs for CVE-2026-49743

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III. Intelligence Information for CVE-2026-49743

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News Coverage for CVE-2026-49743 (1)

Same Patch Batch · Imagination Technologies · 2026-07-24 · 4 CVEs total

CVE-2026-49744 GPU DDK - Unchecked ui32TracePointer in rgxfw_log_ex()
CVE-2026-49745 GPU DDK - Unvalidated sHWPerfCtlDMABuf GPU-VA, DMA-write into FW privdata via MMU ctx 0
CVE-2026-16280 GPU DDK - Integer overflow in _PMRLogicalOffsetToPhysicalOffset

IV. Related Vulnerabilities

Same product: Graphics DDK
Same vendor: Imagination Technologies
Same weakness: CWE-416

V. Comments for CVE-2026-49743

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