What is CVE-2025-70101?

CVE-2025-70101 is a medium-severity vulnerability in Gkostka Lwext4, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-06-03.

How severe is CVE-2025-70101?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Gkostka Lwext4

CVE-2025-70101

An out-of-bounds read in the ext4_ext_binsearch_idx function in src/ext4_extent.c of the lwext4 1.0.0 library allows attackers to cause a denial of service by supplying a specially crafted ext4 filesystem image. The vulnerability occurs du…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (8.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

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

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

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-2025-70101?: CVE-2025-70101 is a medium-severity vulnerability in Gkostka Lwext4, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-06-03.
How severe is CVE-2025-70101?: Medium severity. CVSS v3 base score is 6.5 out of 10.