Linux Kernel up to 6.9.6 lpi2c clk_get_rate deadlock

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.9.6. It has been declared as critical. Impacted is the function clk_get_rate of the component lpi2c. Such manipulation leads to deadlock. This vulnerability is listed as CVE-2024-40965. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.9.6. Affected by this issue is the function clk_get_rate of the component lpi2c. The manipulation with an unknown input leads to a deadlock vulnerability. Using CWE to declare the problem leads to CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: i2c: lpi2c: Avoid calling clk_get_rate during transfer Instead of repeatedly calling clk_get_rate for each transfer, lock the clock rate and cache the value. A deadlock has been observed while adding tlv320aic32x4 audio codec to the system. When this clock provider adds its clock, the clk mutex is locked already, it needs to access i2c, which in return needs the mutex for clk_get_rate as well.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2024-40965 since 07/12/2024. The exploitation is known to be difficult. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 208425 (SUSE SLES15 Security Update : kernel (SUSE-SU-2024:3553-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.9.7 eliminates this vulnerability. Applying the patch 2b42e9587a7a/4268254a3948 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 (208425). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.9.0
• 6.9.1
• 6.9.2
• 6.9.3
• 6.9.4
• 6.9.5
• 6.9.6

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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