CVE-2024-26590

CVSS 3.1 Score 5.5 of 10 (medium)

Details

Published Feb 22, 2024
Updated: Mar 18, 2024
CWE ID 476

Summary

CVE-2024-26590 is a kernel vulnerability affecting the EROFS file system in Linux. This issue arises due to the inconsistent handling of per-file compression formats. EROFS allows users to select compression algorithms on a per-file basis, but the on-disk superblock needs to be updated accordingly. However, syzkaller can generate crafted images with unsupported algorithm types for specific inodes, leading to a NULL pointer dereference if the corresponding decompressor isn't built-in. To mitigate this, the kernel now checks against `sbi->available_compr_algs` for each `m_algorithmformat` request, preventing the dereference of unsupported formats and addressing the vulnerability.

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