{"id":"CVE-2021-26401","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-26401","generatedAt":"2026-10-27T22:24:13.871Z","title":"LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.","description":"LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.","published":"2022-03-11T18:15:11.000Z","lastModified":"2026-06-17T03:43:20.000Z","status":"Modified","sourceIdentifier":"psirt@amd.com","cvss":{"version":"3.1","score":5.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"},"cwe":[],"affected":["amd/athlon x4 940 firmware","amd/athlon x4 950 firmware","amd/athlon x4 970 firmware","amd/athlon x4 835 firmware","amd/athlon x4 845 firmware","amd/athlon x4 830 firmware","amd/athlon x4 840 firmware","amd/athlon x4 860k firmware","amd/athlon x4 870k firmware","amd/athlon x4 880k firmware","amd/athlon x4 750 firmware","amd/athlon x4 760k firmware","amd/ryzen threadripper pro 5995wx firmware","amd/ryzen threadripper pro 5975wx firmware","amd/ryzen threadripper pro 5965wx firmware","amd/ryzen threadripper pro 5955wx firmware","amd/ryzen threadripper pro 5945wx firmware","amd/ryzen threadripper 2990wx firmware","amd/ryzen threadripper 2970wx firmware","amd/ryzen threadripper 2950x firmware","amd/ryzen threadripper 2920x firmware","amd/ryzen threadripper 3970x firmware","amd/a12-9730p firmware","amd/a12-9700p firmware","amd/a10-9630p firmware","amd/a10-9600p firmware","amd/a9-9420 firmware","amd/a9-9410 firmware","amd/a6-9220 firmware","amd/a6-9220c firmware","amd/a6-9210 firmware","amd/a4-9120 firmware","amd/ryzen 7 2700x firmware","amd/ryzen 7 2700 firmware","amd/ryzen 5 2600x firmware","amd/ryzen 5 2600 firmware","amd/ryzen 9 3950x firmware","amd/ryzen 9 3900x firmware","amd/ryzen 7 3800x firmware","amd/ryzen 7 3700x firmware","amd/ryzen 5 3600x firmware","amd/ryzen 5 3600 firmware","amd/ryzen 5 3400g firmware","amd/ryzen 3 3300x firmware","amd/ryzen 3 3300g firmware","amd/ryzen 3 3100 firmware","amd/ryzen 7 4700g firmware","amd/ryzen 7 4700ge firmware","amd/ryzen 5 4600g firmware","amd/ryzen 5 4600ge firmware","amd/ryzen 3 4300g firmware","amd/ryzen 3 4300ge firmware","amd/athlon gold 3450g firmware","amd/athlon gold 3150ge firmware","amd/athlon silver 3050ge firmware","amd/ryzen 3 2200u firmware","amd/ryzen 3 2300u firmware","amd/ryzen 3 pro 2300u firmware","amd/ryzen 5 2500u firmware","amd/ryzen 5 pro 2500u firmware"],"epss":{"score":0.00293,"percentile":0.21696,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2022/03/18/2","tags":["Mailing List","Third Party Advisory"],"source":"psirt@amd.com"},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1036","tags":["Vendor Advisory"],"source":"psirt@amd.com"},{"url":"http://www.openwall.com/lists/oss-security/2022/03/18/2","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1036","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26401","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."}