CVE-2025-70101: n/a
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.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in the ext4_ext_binsearch_idx function within the lwext4 1.0.0 library's ext4 extent handling code. The root cause is insufficient validation of extent header fields before performing a binary search over extent index entries, which can cause invalid pointer arithmetic and memory access beyond allocated bounds. An attacker can exploit this by supplying a crafted ext4 filesystem image, resulting in a denial of service condition. The vulnerability is documented as CVE-2025-70101 with no available CVSS score or patch information.
Potential Impact
The primary impact of this vulnerability is denial of service, as the out-of-bounds read can cause application or system crashes when processing malicious ext4 filesystem images. There is no information indicating code execution or data corruption beyond the denial of service effect. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted ext4 filesystem images with lwext4 1.0.0 to mitigate risk.
CVE-2025-70101: n/a
Description
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.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in the ext4_ext_binsearch_idx function within the lwext4 1.0.0 library's ext4 extent handling code. The root cause is insufficient validation of extent header fields before performing a binary search over extent index entries, which can cause invalid pointer arithmetic and memory access beyond allocated bounds. An attacker can exploit this by supplying a crafted ext4 filesystem image, resulting in a denial of service condition. The vulnerability is documented as CVE-2025-70101 with no available CVSS score or patch information.
Potential Impact
The primary impact of this vulnerability is denial of service, as the out-of-bounds read can cause application or system crashes when processing malicious ext4 filesystem images. There is no information indicating code execution or data corruption beyond the denial of service effect. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted ext4 filesystem images with lwext4 1.0.0 to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-01-09T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2037c3e29bf47b50c14d9d
Added to database: 6/3/2026, 2:18:43 PM
Last enriched: 6/3/2026, 2:49:16 PM
Last updated: 6/4/2026, 6:27:42 AM
Views: 6
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