CVE-2026-34960

barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcp_message_type() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK packet without a proper 0xff end marker to cause the parser to read past valid packet data and potentially crash the system.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

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-out-of-bounds-read-in-dhcp-option-parsing	Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

16 May 2026, 03:07

Type	Values Removed	Values Added
References	~~() https://github.com/barebox/barebox -~~	() https://github.com/barebox/barebox - Product
References	~~() https://github.com/barebox/barebox/releases/tag/v2026.04.0 -~~	() https://github.com/barebox/barebox/releases/tag/v2026.04.0 - Release Notes
References	~~() https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing -~~	() https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing - Third Party Advisory
First Time		Pengutronix barebox Pengutronix
CPE		cpe:2.3:a:pengutronix:barebox::::::::

11 May 2026, 22:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-11 22:22

Updated : 2026-05-16 03:07

NVD link : CVE-2026-34960

Mitre link : CVE-2026-34960

CVE.ORG link : CVE-2026-34960

JSON object : View

Products Affected

pengutronix

barebox

CWE

CWE-125

Out-of-bounds Read

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