Linux Kernel up to 5.15.26/5.16.7 mxsfb drm_atomic_get_new_bridge_state null pointer dereference

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 5.15.26/5.16.7. The impacted element is the function drm_atomic_get_new_bridge_state of the component mxsfb. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2022-48718. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.26/5.16.7. It has been declared as critical. This vulnerability affects the function drm_atomic_get_new_bridge_state of the component mxsfb. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference mxsfb should not ever dereference the NULL pointer which drm_atomic_get_new_bridge_state is allowed to return. Assume a fixed format instead.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-48718. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 249944 (Linux Distros Unpatched Vulnerability : CVE-2022-48718), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.27 or 5.16.8 eliminates this vulnerability. Applying the patch 86a337bb8030/6f9267e01cca/622c9a3a7868 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 (249944). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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