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CVE-2024-26590

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: erofs: fix inconsistent per-file compression format EROFS can select compression algorithms on a per-file basis, and each per-f…

Published Feb 22, 2024CWE-476EPSS 0.22%

Overview

CVE-2024-26590 is a medium-severity vulnerability. It was published on February 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

erofs: fix inconsistent per-file compression format

EROFS can select compression algorithms on a per-file basis, and each

per-file compression algorithm needs to be marked in the on-disk

superblock for initialization.

However, syzkaller can generate inconsistent crafted images that use

an unsupported algorithmtype for specific inodes, e.g. use MicroLZMA

algorithmtype even it's not set in `sbi->available_compr_algs`. This

can lead to an unexpected "BUG: kernel NULL pointer dereference" if

the corresponding decompressor isn't built-in.

Fix this by checking against `sbi->available_compr_algs` for each

m_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs preset

bitmap is now fixed together since it was harmless previously.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/118a8cf504d7dfa519562d000f423ee3ca75d2c4Refgit.kernel.org/stable/c/47467e04816cb297905c0f09bc2d11ef865942d9Refgit.kernel.org/stable/c/823ba1d2106019ddf195287ba53057aee33cf724Refgit.kernel.org/stable/c/eed24b816e50c6cd18cbee0ff0d7218c8fced199Refgit.kernel.org/stable/c/118a8cf504d7dfa519562d000f423ee3ca75d2c4Refgit.kernel.org/stable/c/47467e04816cb297905c0f09bc2d11ef865942d9Refgit.kernel.org/stable/c/823ba1d2106019ddf195287ba53057aee33cf724Refgit.kernel.org/stable/c/eed24b816e50c6cd18cbee0ff0d7218c8fced199

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26590?

CVE-2024-26590 is a medium-severity vulnerability. It was published on February 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26590?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-26590?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-26590?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26590 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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