Linux Kernel up to 6.11.3 sfc xdp_do_flush denial of service

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.11.3. Impacted is the function xdp_do_flush of the component sfc. This manipulation causes denial of service. The identification of this vulnerability is CVE-2024-50094. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.11.3 and classified as problematic. Affected by this vulnerability is the function xdp_do_flush of the component sfc. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: sfc: Don't invoke xdp_do_flush() from netpoll. Yury reported a crash in the sfc driver originated from netpoll_send_udp(). The netconsole sends a message and then netpoll invokes the driver's NAPI function with a budget of zero. It is dedicated to allow driver to free TX resources, that it may have used while sending the packet. In the netpoll case the driver invokes xdp_do_flush() unconditionally, leading to crash because bpf_net_context was never assigned. Invoke xdp_do_flush() only if budget is not zero.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2024-50094 since 10/21/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 216493 (Ubuntu 24.10 : Linux kernel vulnerabilities (USN-7276-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.11.4 eliminates this vulnerability. Applying the patch 65d4fc76d75c/55e802468e1d 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 (216493), EUVD (EUVD-2024-44569) and CERT Bund (WID-SEC-2024-3339). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Open Source eCryptfs
• SUSE openSUSE
• RESF Rocky Linux
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.11.0
• 6.11.1
• 6.11.2
• 6.11.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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