CVE-2026-34962barebox ext4 Directory Parsing Infinite Loop Denial of Service
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No exploitation reported and no EPSS estimate yet.
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barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.
- CVSS
- 6.2 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Modified
- Record last updated
- Jul 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
barebox barebox barebox:barebox (from the name) | before 2026.04.0 | CNA record |
pengutronix barebox pengutronix:barebox | before 2026.04.0 | NVD |
References
- https://github.com/barebox/bareboxproduct
- https://github.com/barebox/barebox/releases/tag/v2026.04.0patch, release-notes
- https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-servicethird-party-advisory
- https://y637f9qq2x.com/posts/barebox-sandbox-vulns/technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.