Linux Kernel up to 6.10.7 erofs z_erofs_gbuf_growsize memory leak

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.10.7. The impacted element is the function z_erofs_gbuf_growsize of the component erofs. The manipulation results in memory leak. This vulnerability is known as CVE-2024-46688. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.10.7. It has been classified as critical. Affected is the function z_erofs_gbuf_growsize of the component erofs. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: erofs: fix out-of-bound access when z_erofs_gbuf_growsize() partially fails If z_erofs_gbuf_growsize() partially fails on a global buffer due to memory allocation failure or fault injection (as reported by syzbot [1]), new pages need to be freed by comparing to the existing pages to avoid memory leaks. However, the old gbuf->pages[] array may not be large enough, which can lead to null-ptr-deref or out-of-bound access. Fix this by checking against gbuf->nrpages in advance. [1] https://lore.kernel.org/r/[email protected]

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2024-46688 since 09/11/2024. The exploitability is told to be difficult. Technical details are known, but there is no available exploit.

Upgrading to version 6.10.8 eliminates this vulnerability. Applying the patch 49c0e0819980/0005e01e1e87 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

• 6.10.0
• 6.10.1
• 6.10.2
• 6.10.3
• 6.10.4
• 6.10.5
• 6.10.6
• 6.10.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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