Linux Kernel up to 6.10-rc2 sch_multiq multiq_tune out-of-bounds write

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.10-rc2. The affected element is the function multiq_tune of the component sch_multiq. The manipulation results in out-of-bounds write. This vulnerability is identified as CVE-2024-36978. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.10-rc2. Affected is the function multiq_tune of the component sch_multiq. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: sched: sch_multiq: fix possible OOB write in multiq_tune() q->bands will be assigned to qopt->bands to execute subsequent code logic after kmalloc. So the old q->bands should not be used in kmalloc. Otherwise, an out-of-bounds write will occur.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-36978 since 05/30/2024. The exploitability is told to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/05/2025).

The vulnerability scanner Nessus provides a plugin with the ID 207802 (Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-7003-4)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.10-rc3 eliminates this vulnerability. Applying the patch affc18fdc694 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 databases at Tenable (207802) and CERT Bund (WID-SEC-2025-1293). Once again VulDB remains the best source for vulnerability data.

Affected

• Ubuntu Linux
• IBM DataPower Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.10-rc1
• 6.10-rc2

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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