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CVE-2026-34962

barebox ext4 Directory Parsing Infinite Loop Denial of Service

Published: May 11, 2026Updated: May 13, 2026 Sources: CVE List NVDCWE-835
NVD MITRE
6.2CVSSMEDIUM
EPSS Score
0.1%
Top 97.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-835

Affected Products

bareboxpengutronix
Embedded
Hardware Firmware / bios-uefi
bareboxbarebox
pengutronixcommercialDEHardware Firmwareaka pengutronix barebox, rauc

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/barebox/barebox
github.com
https://github.com/barebox/barebox/releases/tag/v2026.04.0
github.com
https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service
vulncheck.com

Timeline

Published
May 11, 2026
Last Updated
May 13, 2026

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