Linux Kernel up to 6.7.5/6.8-rc2 huge_memory memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.7.5/6.8-rc2. Affected by this issue is some unknown functionality of the component huge_memory. The manipulation results in memory corruption. This vulnerability is cataloged as CVE-2024-26621. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.7.5/6.8-rc2 (Operating System). Affected is an unknown functionality of the component huge_memory. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm: huge_memory: don't force huge page alignment on 32 bit commit efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries") caused two issues [1] [2] reported on 32 bit system or compat userspace. It doesn't make too much sense to force huge page alignment on 32 bit system due to the constrained virtual address space. [1] https://lore.kernel.org/linux-mm/[email protected]/ [2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD-sQ@mail.gmail.com/

The weakness was shared 03/02/2024. The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-26621 since 02/19/2024. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/17/2025).

Upgrading to version 6.7.6 or 6.8-rc3 eliminates this vulnerability. Applying the patch 7432376c9133/4ef9ad19e176 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

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4
• 6.7.5
• 6.8-rc1
• 6.8-rc2

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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