{"id":"CVE-2026-121295","aliases":["EUVD-2026-122816","GHSA-328w-w3mm-pwh5"],"status":"published","title":"Security Advisory 0223","description":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.","severity":{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0046,"percentile":0.40387,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1284"],"published":"2026-11-10T20:09:59Z","modified":"2026-11-10T21:34:30Z","products":[{"vendor":"arista networks","product":"eos"}],"references":[{"url":"https://www.arista.com/en/support/advisories-notices/security-advisory/25045-security-advisory-0223","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121295"},{"url":"https://github.com/advisories/GHSA-328w-w3mm-pwh5"}],"sources":{"cve":[{"id":"CVE-2026-121295","title":"Security Advisory 0223","description":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.","status":"published","published":"2026-11-10T20:09:59.572Z","modified":"2026-11-10T20:09:59.572Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"critical","assessor":"cna"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1284"],"updated_at":"2026-11-10T22:18:26.838446Z"}],"euvd":[{"id":"EUVD-2026-122816","description":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.","status":"published","published":"2026-11-10T20:09:59Z","modified":"2026-11-10T20:09:59Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"critical"}],"updated_at":"2026-11-11T00:25:01.852805Z"}],"ghsa":[{"id":"GHSA-328w-w3mm-pwh5","title":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker...","description":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.","status":"published","published":"2026-11-10T21:34:29Z","modified":"2026-11-10T21:34:30Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1284"],"updated_at":"2026-11-10T21:57:57.751909Z"}],"nvd":[{"id":"CVE-2026-121295","description":"On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.","status":"published","published":"2026-11-10T20:18:55.75Z","modified":"2026-11-10T20:18:55.75Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1284"],"updated_at":"2026-11-10T22:21:33.755054Z"}]}}