CVE-2025-70099
7.5 HIGHA NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a den...
Published: 2026-06-01 · Last updated: 2026-06-02
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-476
Description
A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-70099
- [Other]https://github.com/gkostka/lwext4/issues/89
- [Other]https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126
- [Other]https://infosec.exchange/@sigdevel/116668939725424227
- [Other]https://github.com/gkostka/lwext4/issues/89
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