CVE-2025-70101
Medium · 6.5CVSS
6.5
EPSS
0.3%
Published
Jun 3, 2026
CISA due date
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The record
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 due to insufficient validation of extent header fields before performing a binary search over extent index entries, which can result in invalid pointer calculations and an out-of-bounds memory read during extent tree traversal.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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