{"id":"CVE-2026-34960","title":"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","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"pengutronix","product":"barebox","affected":["barebox < 2026.04.0"],"patched":["barebox 2026.04.0"],"published":"2026-05-11","updated":"2026-07-18","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34960","references":[{"url":"https://github.com/barebox/barebox","label":"disclosure@vulncheck.com"},{"url":"https://github.com/barebox/barebox/releases/tag/v2026.04.0","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing","label":"disclosure@vulncheck.com"},{"url":"https://y637f9qq2x.com/posts/barebox-sandbox-vulns/","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.0038,"epssPercentile":0.29181,"ingestedAt":"2026-07-18T03:20:40.004Z","slug":"CVE-2026-34960","body":"## Overview\n\nbarebox 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.\n\n## Affected\n\n- `barebox < 2026.04.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `barebox 2026.04.0`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}