CVE-2025-70100
Analyzed
Analyzed - Analysis Complete
Divide-by-Zero in lwext4 1.0.0 Library
Publication date: 2026-06-03
Last updated on: 2026-06-05
Assigner: MITRE
Description
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.
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gkostka | lwext4 | 1.0.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-369 | The product divides a value by zero. |