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.
References
| Link | Resource |
|---|---|
| https://github.com/gkostka/lwext4/issues/91 | Exploit Issue Tracking Patch |
| https://github.com/sigdevel/pocs/blob/main/res/lwext4/3/sig11_lwext4_ext4_extent_815 | Exploit |
| https://infosec.exchange/@sigdevel/116668958927817708 | Exploit Patch Third Party Advisory |
| https://github.com/gkostka/lwext4/issues/91 | Exploit Issue Tracking Patch |
Configurations
History
05 Jun 2026, 21:10
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Gkostka
Gkostka lwext4 |
|
| CPE | cpe:2.3:a:gkostka:lwext4:1.0.0:*:*:*:*:*:*:* | |
| References | () https://github.com/gkostka/lwext4/issues/91 - Exploit, Issue Tracking, Patch | |
| References | () https://github.com/sigdevel/pocs/blob/main/res/lwext4/3/sig11_lwext4_ext4_extent_815 - Exploit | |
| References | () https://infosec.exchange/@sigdevel/116668958927817708 - Exploit, Patch, Third Party Advisory |
03 Jun 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-125 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 6.5 |
| References | () https://github.com/gkostka/lwext4/issues/91 - |
03 Jun 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-03 14:16
Updated : 2026-06-05 21:10
NVD link : CVE-2025-70101
Mitre link : CVE-2025-70101
CVE.ORG link : CVE-2025-70101
JSON object : View
Products Affected
gkostka
- lwext4
CWE
CWE-125
Out-of-bounds Read