CVE-2025-70099: n/a
A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
AI Analysis
Technical Summary
This vulnerability involves a NULL pointer dereference in the ext4_dir_en_get_name_len function within include/ext4_dir.h of lwext4 1.0.0. When processing EXT4 filesystem images, the function may access the name_len field of a directory entry without verifying that the pointer is valid. If an attacker supplies a malformed EXT4 image with corrupted directory entries, this can trigger a segmentation fault, resulting in a denial of service condition. The affected code is based on the 2016-era lwext4 1.0.0 codebase. No patch or official remediation has been documented as of the published date.
Potential Impact
Successful exploitation causes a denial of service by crashing the process handling the EXT4 filesystem image. There is no indication of confidentiality or integrity impact. The vulnerability requires no privileges and no user interaction, and can be triggered remotely if the attacker can supply a crafted EXT4 image to the vulnerable system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted or malformed EXT4 filesystem images with lwext4 1.0.0. Monitor vendor channels for updates or patches addressing this issue.
CVE-2025-70099: n/a
Description
A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a NULL pointer dereference in the ext4_dir_en_get_name_len function within include/ext4_dir.h of lwext4 1.0.0. When processing EXT4 filesystem images, the function may access the name_len field of a directory entry without verifying that the pointer is valid. If an attacker supplies a malformed EXT4 image with corrupted directory entries, this can trigger a segmentation fault, resulting in a denial of service condition. The affected code is based on the 2016-era lwext4 1.0.0 codebase. No patch or official remediation has been documented as of the published date.
Potential Impact
Successful exploitation causes a denial of service by crashing the process handling the EXT4 filesystem image. There is no indication of confidentiality or integrity impact. The vulnerability requires no privileges and no user interaction, and can be triggered remotely if the attacker can supply a crafted EXT4 image to the vulnerable system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted or malformed EXT4 filesystem images with lwext4 1.0.0. Monitor vendor channels for updates or patches addressing this issue.
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: 6a1de930e29bf47b503e82cf
Added to database: 06/01/2026, 20:18:56 UTC
Last enriched: 06/29/2026, 20:58:29 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 62
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