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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T08:51:43.931Z

Reserved: 2024-02-19T14:20:24.126Z

Link: CVE-2024-26590

cve-icon Vulnrichment

Updated: 2024-08-02T00:07:19.710Z

cve-icon NVD

Status : Modified

Published: 2024-02-22T17:15:09.103

Modified: 2025-04-22T17:16:40.560

Link: CVE-2024-26590

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.