{"id":"CVE-2026-74225","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74225","generatedAt":"2026-10-28T01:02:10.261Z","title":"U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets.","description":"U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.","published":"2026-09-29T22:18:34.000Z","lastModified":"2026-09-30T20:17:35.000Z","status":"Awaiting Analysis","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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"},"cwe":["CWE-787"],"affected":[],"epss":{"score":0.00229,"percentile":0.13584,"date":"2026-10-26","history":[{"date":"2026-09-30","score":0.00232,"percentile":0.12715}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T22:18:34.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-09-29T22:18:33.827Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/u-boot/u-boot","source":"disclosure@vulncheck.com"},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/net/dhcpv6.c#L304","source":"disclosure@vulncheck.com"},{"url":"https://github.com/u-boot/u-boot/commit/20209a62bc8565fc1e040882bc03c71ff0d73076","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-out-of-bounds-write-via-dhcpv6","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74225","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}