CVE-2026-34962

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 v3 6.2 MEDIUM

6.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.5 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/barebox/barebox	Product
https://github.com/barebox/barebox/releases/tag/v2026.04.0	Release Notes
https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service	Third Party Advisory
https://y637f9qq2x.com/posts/barebox-sandbox-vulns/

Configurations

Configuration 1 (hide)

cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-11 23:19

Updated : 2026-07-18 03:16

NVD link : CVE-2026-34962

Mitre link : CVE-2026-34962

CVE.ORG link : CVE-2026-34962

JSON object : View

Products Affected

pengutronix

barebox

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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