{"id":"CVE-2018-8934","aliases":["EUVD-2018-20542","GHSA-jf6h-g8vv-jx4q"],"status":"published","title":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware,...","description":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.","severity":{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0175,"percentile":0.78005,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-03-22T14:00:00Z","modified":"2026-06-17T02:05:40Z","products":[{"vendor":"amd","product":"ryzen_firmware"},{"vendor":"amd","product":"ryzen_pro_firmware"}],"references":[{"url":"https://amdflaws.com/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://blog.trailofbits.com/2018/03/15/amd-flaws-technical-summary/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://community.amd.com/community/amd-corporate/blog/2018/03/21/initial-amd-technical-assessment-of-cts-labs-research","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://safefirmware.com/amdflaws_whitepaper.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8934"},{"url":"https://github.com/advisories/GHSA-jf6h-g8vv-jx4q"}],"sources":{"cve":[{"id":"CVE-2018-8934","description":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.","status":"published","published":"2018-03-22T14:00:00Z","modified":"2024-08-05T07:10:46.982Z","updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-20542","description":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.","status":"published","published":"2018-03-22T14:00:00Z","modified":"2024-08-05T07:10:46Z","updated_at":"2026-11-03T02:40:01.4233Z"}],"ghsa":[{"id":"GHSA-jf6h-g8vv-jx4q","title":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware,...","description":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.","status":"published","published":"2022-05-13T01:53:49Z","modified":"2023-02-02T05:02:24Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T14:51:26.066709Z"}],"nvd":[{"id":"CVE-2018-8934","description":"The Promontory chipset, as used in AMD Ryzen and Ryzen Pro platforms, has a backdoor in firmware, aka CHIMERA-FW.","status":"published","published":"2018-03-22T14:29:00.863Z","modified":"2026-06-17T02:05:40.96Z","cvss":[{"version":"3.0","score":9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:04:24.264003Z"}]}}