Linux Kernel up to 6.6.16/6.7.4 Display dcn21_set_pipe null pointer dereference

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.6.16/6.7.4. This vulnerability affects the function dcn21_set_pipe of the component Display. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2024-26661. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.16/6.7.4. This affects the function dcn21_set_pipe of the component Display. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add NULL test for 'timing generator' in 'dcn21_set_pipe()' In "u32 otg_inst = pipe_ctx->stream_res.tg->inst;" pipe_ctx->stream_res.tg could be NULL, it is relying on the caller to ensure the tg is not NULL.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-26661 since 02/19/2024. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 210741 (Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-7100-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.17, 6.7.5 or 6.8 eliminates this vulnerability. Applying the patch 3f3c237a7065/39f24c08363a/66951d98d9bf 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 Tenable (210741). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.6.14
• 6.6.15
• 6.6.16
• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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