barebox ext4 Directory Parsing Infinite Loop Denial of Service (CVE-2026-34962) | HOL Guard CVE

Medium · CVSS 6.2CVE-2026-34962

barebox ext4 Directory Parsing Infinite Loop Denial of Service

Answer in brief

CVE-2026-34962 records a Medium severity (CVSS 6.2) vulnerability in barebox ext4 Directory Parsing Infinite Loop Denial of Service. The current sources do not mark it as known exploited. The current feed maps barebox/barebox (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 11, 2026Updated Jul 18, 2026Source checked Sep 19, 2026First seen by HOL Jul 18, 2026Material review Jul 18, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps barebox/barebox (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
barebox/bareboxgeneric	>=0 <2026.04.0	2026.04.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for barebox/barebox.
Review the reported fix. Update barebox/barebox to 2026.04.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
May 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 18, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.