Linux Kernel up to 6.11.3 drivers/net/netconsole.c write_ext_msg iteration

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.11.3. This affects the function write_ext_msg of the file drivers/net/netconsole.c. Executing a manipulation can lead to iteration. This vulnerability is tracked as CVE-2024-50092. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.11.3. It has been declared as problematic. This vulnerability affects the function write_ext_msg of the file drivers/net/netconsole.c. The manipulation with an unknown input leads to a iteration vulnerability. The CWE definition for the vulnerability is CWE-834. The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: net: netconsole: fix wrong warning A warning is triggered when there is insufficient space in the buffer for userdata. However, this is not an issue since userdata will be sent in the next iteration. Current warning message: ------------[ cut here ]------------ WARNING: CPU: 13 PID: 3013042 at drivers/net/netconsole.c:1122 write_ext_msg+0x3b6/0x3d0 ? write_ext_msg+0x3b6/0x3d0 console_flush_all+0x1e9/0x330 The code incorrectly issues a warning when this_chunk is zero, which is a valid scenario. The warning should only be triggered when this_chunk is negative.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2024-50092 since 10/21/2024. There are known technical details, 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 712a3af37102/d94785bb46b6 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-2024-44567) and CERT Bund (WID-SEC-2024-3339). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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