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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Gkostka |
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References
History
Wed, 03 Jun 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Denial of Service via Out‑of‑Bounds Read in lwext4 Ext4 Parser | |
| First Time appeared |
Gkostka
Gkostka lwext4 |
|
| Weaknesses | CWE-787 | |
| Vendors & Products |
Gkostka
Gkostka lwext4 |
Wed, 03 Jun 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| References |
|
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2026-06-03T00:00:00.000Z
Updated: 2026-06-03T13:56:26.675Z
Reserved: 2026-01-09T00:00:00.000Z
Link: CVE-2025-70101
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-06-03T14:16:31.340
Modified: 2026-06-03T14:16:31.340
Link: CVE-2025-70101
Redhat
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