CVE-2025-70100
- State
- Published
- Severity
- 5.5 Medium
- Published
- Jun 3, 2026
- Updated
- Jun 29, 2026
- Reserved
- Jan 9, 2026
Description
A divide-by-zero vulnerability in the ext4_block_set_lb_size function in src/ext4_blockdev.c of the lwext4 1.0.0 library allows attackers to cause a denial of service by providing a malformed ext4 filesystem image that results in a zero logical block size. The vulnerability is triggered during mount or image processing and leads to a Floating-Point Exception (FPE) under sanitizers or a runtime crash in standard builds due to missing validation of lb_size.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-369 Divide By Zero
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
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