{"id":"CVE-2021-38576","aliases":["DEBIAN-CVE-2021-38576","DLA-4207-1","EUVD-2021-25018","GHSA-h53v-fr53-7vvj","OESA-2022-1515","UBUNTU-CVE-2021-38576"],"status":"published","title":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty....","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01253,"percentile":0.69842,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2022-01-03T21:07:45Z","modified":"2026-10-24T10:30:19Z","fixes":[{"ecosystem":"Debian:12","package":"edk2","fixed_in":["2021.11-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"edk2","fixed_in":["2021.11-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"edk2","fixed_in":["2021.11-1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP1","package":"edk2","fixed_in":["202002-8.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP2","package":"edk2","fixed_in":["202002-8.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP3","package":"edk2","fixed_in":["202002-8.oe1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.11-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.11-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.11-1"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.11-2+deb11u3"}]}],"versions":["2020.11-2","2020.11-2+deb11u1","2020.11-2+deb11u2"],"bundled":16},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202002-8.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP2","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202002-8.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP3","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"202002-8.oe1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20150106.5c2d456b-2","0~20160104.c2a892d7-1","0~20160408.ffea0a2c-2","0~20160408.ffea0a2c-2ubuntu0.1","0~20160408.ffea0a2c-2ubuntu0.2","0~20160408.ffea0a2c-2ubuntu0.2+esm1","0~20160408.ffea0a2c-2ubuntu0.2+esm3","0~20160408.ffea0a2c-2ubuntu0.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20170911.5dfba97c-1","0~20171010.234dbcef-1","0~20171027.76fd5a66-1","0~20171205.a9212288-1","0~20180105.0bc94c74-1","0~20180205.c0d9813c-1","0~20180205.c0d9813c-2","0~20180205.c0d9813c-2ubuntu0.1","0~20180205.c0d9813c-2ubuntu0.2","0~20180205.c0d9813c-2ubuntu0.3","0~20180205.c0d9813c-2ubuntu0.3+esm1","0~20180205.c0d9813c-2ubuntu0.3+esm2","0~20180205.c0d9813c-2ubuntu0.3+esm3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"edk2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0~20190606.20d2e5a1-2ubuntu1","0~20190828.37eef910-3","0~20190828.37eef910-4","0~20191122.bd85bf54-1","0~20191122.bd85bf54-1ubuntu1","0~20191122.bd85bf54-2","0~20191122.bd85bf54-2ubuntu1","0~20191122.bd85bf54-2ubuntu2","0~20191122.bd85bf54-2ubuntu3","0~20191122.bd85bf54-2ubuntu3.1","0~20191122.bd85bf54-2ubuntu3.2","0~20191122.bd85bf54-2ubuntu3.3","0~20191122.bd85bf54-2ubuntu3.4","0~20191122.bd85bf54-2ubuntu3.5","0~20191122.bd85bf54-2ubuntu3.6","0~20191122.bd85bf54-2ubuntu3.6+esm1"]}],"products":[{"vendor":"tianocore","product":"edk ii"},{"vendor":"tianocore","product":"edk2"}],"references":[{"url":"https://bugzilla.tianocore.org/show_bug.cgi?id=3499","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Permissions Required","Third Party Advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38576","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-h53v-fr53-7vvj"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-38576","tags":["advisory"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1515","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-38576","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-38576","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-38576","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T21:07:45Z","modified":"2025-11-03T19:26:14.574Z","updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-25018","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T21:07:45Z","modified":"2025-11-03T19:26:14Z","updated_at":"2026-11-02T19:49:34.152725Z"}],"ghsa":[{"id":"GHSA-h53v-fr53-7vvj","title":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty....","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-04T00:00:32Z","modified":"2025-11-03T21:31:41Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:04:19.274788Z"}],"nvd":[{"id":"CVE-2021-38576","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T22:15:09.903Z","modified":"2026-06-17T04:02:23.653Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:07:03.418194Z"}],"osv":[{"id":"CVE-2021-38576","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T22:15:09.903Z","modified":"2026-10-24T10:30:19.267763548Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"DEBIAN-CVE-2021-38576","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T22:15:09.903Z","modified":"2026-10-23T18:03:50.357492385Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"OESA-2022-1515","title":"edk2 security update","description":"EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.\r\n\r\nSecurity Fix(es):\r\n\r\nA BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.(CVE-2021-38576)","status":"published","published":"2022-02-11T11:04:47Z","modified":"2026-08-18T01:16:20.438001133Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:39.528805Z"},{"id":"UBUNTU-CVE-2021-38576","description":"A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.","status":"published","published":"2022-01-03T22:15:00Z","modified":"2026-10-05T19:19:52.139855378Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:28.526929Z"},{"id":"DLA-4207-1","title":"edk2 - security update","status":"published","published":"2025-06-02T00:00:00Z","modified":"2026-03-09T01:21:23.402813Z","updated_at":"2026-11-02T15:46:12.7027Z"}]}}