{"id":"USN-6244-1","summary":"amd64-microcode vulnerability","details":"Tavis Ormandy discovered that some AMD processors did not properly handle\nspeculative execution of certain vector register instructions. A local attacker\ncould use this to expose sensitive information.\n","modified":"2026-02-10T04:43:12Z","published":"2023-07-25T13:33:55Z","related":["UBUNTU-CVE-2023-20593"],"upstream":["CVE-2023-20593","UBUNTU-CVE-2023-20593"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6244-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-20593"}],"affected":[{"package":{"name":"amd64-microcode","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/amd64-microcode@3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm1"}]}],"versions":["2.20141028.1","2.20160316.1","3.20180524.1~ubuntu0.16.04.1","3.20180524.1~ubuntu0.16.04.2","3.20191021.1ubuntu0.16.04.1","3.20191021.1+really3.20180524.1~ubuntu0.16.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm1","binary_name":"amd64-microcode"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6244-1.json","cves_map":{"cves":[{"id":"CVE-2023-20593","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"high"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"package":{"name":"amd64-microcode","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/amd64-microcode@3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1"}]}],"versions":["3.20160316.3","3.20171205.1","3.20180524.1~ubuntu0.18.04.1","3.20180524.1~ubuntu0.18.04.2","3.20191021.1ubuntu0.18.04.2","3.20191021.1+really3.20181128.1~ubuntu0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1","binary_name":"amd64-microcode"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6244-1.json","cves_map":{"cves":[{"id":"CVE-2023-20593","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"high"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}},{"package":{"name":"amd64-microcode","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/amd64-microcode@3.20191218.1ubuntu1.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20191218.1ubuntu1.1"}]}],"versions":["3.20181128.1ubuntu2","3.20191021.1ubuntu1","3.20191218.1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.20191218.1ubuntu1.1","binary_name":"amd64-microcode"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6244-1.json","cves_map":{"cves":[{"id":"CVE-2023-20593","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"high"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}},{"package":{"name":"amd64-microcode","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/amd64-microcode@3.20191218.1ubuntu2.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20191218.1ubuntu2.1"}]}],"versions":["3.20191218.1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.20191218.1ubuntu2.1","binary_name":"amd64-microcode"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6244-1.json","cves_map":{"cves":[{"id":"CVE-2023-20593","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"high"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}}],"schema_version":"1.7.3"}