CVE-2026-43195
Analyzed Analyzed - Analysis Complete
AMDGPU GPU Page Size Validation Bypass

Publication date: 2026-05-06

Last updated on: 2026-05-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate user queue size constraints Add validation to ensure user queue sizes meet hardware requirements: - Size must be a power of two for efficient ring buffer wrapping - Size must be at least AMDGPU_GPU_PAGE_SIZE to prevent undersized allocations This prevents invalid configurations that could lead to GPU faults or unexpected behavior.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-11
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-14
NVD
CVE-2026-43195
EUVD
EUVD-2026-27754
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.19 (inc) to 6.19.6 (exc)
linux linux_kernel From 6.16 (inc) to 6.18.16 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Mitigation Strategies

To mitigate this vulnerability, ensure that your Linux kernel is updated to a version that includes the fix for validating user queue size constraints in the amdgpu driver.

Specifically, the fix enforces that user queue sizes are powers of two and at least the size of AMDGPU_GPU_PAGE_SIZE, preventing invalid configurations that could cause GPU faults or unexpected behavior.

Therefore, applying the latest kernel updates from your distribution or compiling a patched kernel version is the immediate step to prevent exploitation.

Executive Summary

This vulnerability in the Linux kernel's AMDGPU driver relates to improper validation of user queue sizes. Specifically, the driver did not ensure that the size of user queues met certain hardware requirements.

  • The size must be a power of two to allow efficient ring buffer wrapping.
  • The size must be at least AMDGPU_GPU_PAGE_SIZE to avoid undersized allocations.

Without these validations, invalid queue sizes could be configured, potentially causing GPU faults or unexpected behavior.

Impact Analysis

If exploited or triggered, this vulnerability could lead to GPU faults or unexpected behavior in systems using the AMDGPU driver.

Such faults might cause system instability, crashes, or degraded graphics performance, impacting the reliability of applications relying on GPU processing.

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