CVE-2026-34961

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 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-extent-parsing-out-of-bounds-read	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 22:22

Updated : 2026-07-18 03:16

NVD link : CVE-2026-34961

Mitre link : CVE-2026-34961

CVE.ORG link : CVE-2026-34961

JSON object : View

Products Affected

pengutronix

barebox

CWE

CWE-125

Out-of-bounds Read

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