CVE-2026-34960

7.1 highEPSS 0.2%

High (7.1) in pengutronix barebox. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

7.1 high

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

6.5 medium

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2026-05-11
Modified: 2026-07-18
Record from: the NVD, synced 2026-10-19

Affected

pengutronix:barebox

References

https://github.com/barebox/barebox
https://github.com/barebox/barebox/releases/tag/v2026.04.0
https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing
https://y637f9qq2x.com/posts/barebox-sandbox-vulns/

Check your stack JSON