CVE-2026-34961
barebox ext4 Extent Parsing Out-of-Bounds Read
- State
- Published
- Severity
- 6.9 Medium
- Published
- May 11, 2026
- Updated
- Jul 18, 2026
- Reserved
- Mar 31, 2026
Description
barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.2 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
bareboxbarebox |
|
References
- https://github.com/barebox/bareboxproduct
- https://github.com/barebox/barebox/releases/tag/v2026.04.0patch
- https://www.vulncheck.com/advisories/barebox-ext4-extent-parsing-out-of-bounds-readthird-party-advisory
- Blog Posttechnical-description
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