CVE-2026-34960

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductPengutronix Barebox

PublishedMay 11, 2026

First seenMay 11, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

pengutronix barebox2026.04.0 or later

Patches

github.com/barebox/barebox/releases/tag/v2026.04.0

Affected products

Product	Affected versions	Fixed in
pengutronix barebox	v < 2026.04.0	2026.04.0

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