Linux Kernel up to 6.1/6.6.13/6.7.1 on x86 uncore upi_fill_topology null pointer dereference

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 6.1/6.6.13/6.7.1 on x86. The affected element is the function upi_fill_topology of the component uncore. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2023-52450. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.1/6.6.13/6.7.1 on x86 (Operating System). Affected by this vulnerability is the function upi_fill_topology of the component uncore. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology() Get logical socket id instead of physical id in discover_upi_topology() to avoid out-of-bound access on 'upi = &type->topology[nid][idx];' line that leads to NULL pointer dereference in upi_fill_topology()

The weakness was disclosed 02/22/2024. The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-52450 since 02/20/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 210893 (Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2024-12815)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.2, 6.6.14, 6.7.2 or 6.8-rc1 eliminates this vulnerability. Applying the patch 3d6f4a78b104/1692cf434ba1/bf1bf09e6b59 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 (210893). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.0
• 6.1
• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.7.0
• 6.7.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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