Linux Kernel up to 6.6.15/6.7.3 sysctl ctl_table out-of-bounds

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.6.15/6.7.3. The impacted element is the function ctl_table of the component sysctl. Such manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2023-52596. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.15/6.7.3 (Operating System). It has been rated as problematic. Affected by this issue is the function ctl_table of the component sysctl. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix out of bounds access for empty sysctl registers When registering tables to the sysctl subsystem there is a check to see if header is a permanently empty directory (used for mounts). This check evaluates the first element of the ctl_table. This results in an out of bounds evaluation when registering empty directories. The function register_sysctl_mount_point now passes a ctl_table of size 1 instead of size 0. It now relies solely on the type to identify a permanently empty register. Make sure that the ctl_table has at least one element before testing for permanent emptiness.

The weakness was presented 03/06/2024. The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2023-52596 since 03/02/2024. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.16, 6.7.4 or 6.8-rc1 eliminates this vulnerability. Applying the patch 15893975e9e3/2ae7081bc101/315552310c7d 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 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
• 6.6.14
• 6.6.15
• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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