Linux Kernel up to 6.18.15/6.19.5 buffer overflow

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.15/6.19.5 and classified as critical. This impacts an unknown function. The manipulation leads to buffer overflow. This vulnerability is traded as CVE-2026-43195. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.18.15/6.19.5. This issue affects an unknown part. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-43195 since 05/01/2026. The exploitation is known to be easy. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/06/2026).

Upgrading to version 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch cf2a37be899dc1b01f53bf1d0157330eaf3e3f55/9f6cc309cd15922fe58cab2dfa1b5993ad31dec7/8079b87c02e531cc91601f72ea8336dd2262fdf1 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

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