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).
Metrics
Affected Vendors & Products
References
History
Wed, 03 Jun 2026 02:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Gkostka
Gkostka lwext4 |
|
| Vendors & Products |
Gkostka
Gkostka lwext4 |
Tue, 02 Jun 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | NULL Pointer Dereference in lwext4 Causing Denial of Service on Malformed EXT4 Filesystem Images |
Tue, 02 Jun 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Mon, 01 Jun 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | NULL Pointer Dereference in lwext4 Causing Denial of Service on Malformed EXT4 Filesystem Images | |
| Weaknesses | CWE-476 |
Mon, 01 Jun 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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). | |
| References |
|
Status: PUBLISHED
Assigner: mitre
Published: 2026-06-01T00:00:00.000Z
Updated: 2026-06-02T15:20:25.038Z
Reserved: 2026-01-09T00:00:00.000Z
Link: CVE-2025-70099
Updated: 2026-06-02T15:20:18.622Z
Status : Deferred
Published: 2026-06-01T21:16:24.187
Modified: 2026-06-02T16:16:30.917
Link: CVE-2025-70099
No data.