What is CVE-2025-70100?

CVE-2025-70100 is a medium-severity vulnerability in Gkostka Lwext4, classified under Divide By Zero. CVSS score: 5.5/10. Published 2026-06-03.

How severe is CVE-2025-70100?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Gkostka Lwext4

CVE-2025-70100

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 lo…

EPSS: 0.000 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Gkostka Lwext4 — versions 1.0.0
N/a — versions n/a

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

cve@mitre.org (Exploit, Patch, Issue Tracking)
cve@mitre.org (Exploit)
cve@mitre.org (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2025-70100?: CVE-2025-70100 is a medium-severity vulnerability in Gkostka Lwext4, classified under Divide By Zero. CVSS score: 5.5/10. Published 2026-06-03.
How severe is CVE-2025-70100?: Medium severity. CVSS v3 base score is 5.5 out of 10.