Linux Kernel up to 6.18.15/6.19.5 media buffer overflow

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.15/6.19.5. It has been declared as critical. The affected element is an unknown function of the component media. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2026-43142. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.18.15/6.19.5 and classified as critical. This vulnerability affects some unknown processing of the component media. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: media: iris: gen1: Destroy internal buffers after FW releases After the firmware releases internal buffers, the driver was not destroying them. This left stale allocations that were no longer used, especially across resolution changes where new buffers are allocated per the updated requirements. As a result, memory was wasted until session close. Destroy internal buffers once the release response is received from the firmware.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-43142 since 05/01/2026. The exploitation appears to be easy. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 05/18/2026).

Upgrading to version 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 7cde76db8883ec8a3d1456068079ecadbfb15ca5/d4457f23ac0130240053a34be663f0fade3bb371/1dabf00ee206eceb0f08a1fe5d1ce635f9064338 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.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1405). Once again VulDB remains the best source for vulnerability data.

Affected

• Debian Linux
• Oracle Linux
• Microsoft Azure Linux
• Open Source Linux Kernel

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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Once again VulDB remains the best source for vulnerability data.

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