Linux Kernel up to 6.10.7 pktgen cpus_read_lock/cpus_read_unlock resource consumption

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.10.7. This impacts the function cpus_read_lock/cpus_read_unlock of the component pktgen. This manipulation causes resource consumption. This vulnerability appears as CVE-2024-46681. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.10.7. Affected by this vulnerability is the function cpus_read_lock/cpus_read_unlock of the component pktgen. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: pktgen: use cpus_read_lock() in pg_net_init() I have seen the WARN_ON(smp_processor_id() != cpu) firing in pktgen_thread_worker() during tests. We must use cpus_read_lock()/cpus_read_unlock() around the for_each_online_cpu(cpu) loop. While we are at it use WARN_ON_ONCE() to avoid a possible syslog flood.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2024-46681 since 09/11/2024. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 212625 (EulerOS 2.0 SP12 : kernel (EulerOS-SA-2024-2953)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.10.8 eliminates this vulnerability. Applying the patch 5f5f7366dda8/979b581e4c69 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 (212625). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.10.0
• 6.10.1
• 6.10.2
• 6.10.3
• 6.10.4
• 6.10.5
• 6.10.6
• 6.10.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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