VulnerabilityModified

CVE-2026-34960

HIGH 7.1EPSS 0.25%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 7.1 HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.25% probability · 16th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: pengutronix/barebox
Source: disclosure@vulncheck.com

References

https://github.com/barebox/bareboxProduct
https://github.com/barebox/barebox/releases/tag/v2026.04.0Release Notes
https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsingThird Party Advisory
https://y637f9qq2x.com/posts/barebox-sandbox-vulns/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.