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CVE-2026-34960

barebox Out-of-Bounds Read in DHCP Option Parsing

CVSS 7.1 HIGHEPSS 0.2%CWE-125
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.1EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
11 May 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
barebox · barebox

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References
https://github.com/barebox/bareboxhttps://github.com/barebox/barebox/releases/tag/v2026.04.0https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing