CVE-2024-26590
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…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/118a8cf504d7dfa519562d000f423ee3ca75d2c4Patch
- https://git.kernel.org/stable/c/47467e04816cb297905c0f09bc2d11ef865942d9Patch
- https://git.kernel.org/stable/c/823ba1d2106019ddf195287ba53057aee33cf724Patch
- https://git.kernel.org/stable/c/eed24b816e50c6cd18cbee0ff0d7218c8fced199Patch
- https://git.kernel.org/stable/c/118a8cf504d7dfa519562d000f423ee3ca75d2c4Patch
- https://git.kernel.org/stable/c/47467e04816cb297905c0f09bc2d11ef865942d9Patch
- https://git.kernel.org/stable/c/823ba1d2106019ddf195287ba53057aee33cf724Patch
- https://git.kernel.org/stable/c/eed24b816e50c6cd18cbee0ff0d7218c8fced199Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.