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CVE-2026-34961

barebox ext4 Extent Parsing Out-of-Bounds Read

Published: May 11, 2026Updated: May 13, 2026 Sources: CVE List NVDCWE-125
NVD MITRE
6.2CVSSMEDIUM
EPSS Score
0.2%
Top 89.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

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-125

Affected Products

bareboxbarebox
bareboxpengutronix
Embedded
Hardware Firmware / bios-uefi
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
Collection
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-extent-parsing-out-of-bounds-read
vulncheck.com

Timeline

Published
May 11, 2026
Last Updated
May 13, 2026

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