CVE-2023-4969Public exploit

Cross-process data disclosure via uncleared GPU local memory

Published Jan 16, 2024 · Updated Jun 20, 2025

GPU local-memory disclosure in Khronos OpenCL 3.0.11 and Vulkan 1.3.224 allows local users to read another kernel's data. GPU drivers fail to clear software-managed local memory atomically between kernel executions, so a listener kernel copies uninitialized remnants into CPU-readable global memory. Exploitation requires co-resident access to a vulnerable GPU's programmable interface and exposes data from another application, process, container, or user without altering it.

CVSS severity6.5
Medium
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

GPU local-memory disclosure in Khronos OpenCL 3.0.11 and Vulkan 1.3.224 allows local users to read another kernel's data. GPU drivers fail to clear software-managed local memory atomically between kernel executions, so a listener kernel copies uninitialized remnants into CPU-readable global memory. Exploitation requires co-resident access to a vulnerable GPU's programmable interface and exposes data from another application, process, container, or user without altering it.

The record

CVE
CVE-2023-4969
Published
Jan 16, 2024
Updated
Jun 20, 2025
Vendor
The Khronos Group
Product
Vulkan
Classifications
CWE-119, CWE-401, CWE-200, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.224 <=1.3.224

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Khronos Group · Vulkanversion=1.3.224 <=1.3.224
The Khronos Group · OpenCLversion=3.0.11 <=3.0.11

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-401Missing Release of Memory after Effective Lifetime
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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