{"id":"CVE-2021-27138","aliases":["ALPINE-CVE-2021-27138","DEBIAN-CVE-2021-27138","DLA-4320-1","EUVD-2021-13905","GHSA-grrh-mjp7-g52c","OESA-2021-1130","UBUNTU-CVE-2021-27138"],"status":"published","title":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.01118,"percentile":0.66581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2021-02-17T22:36:52Z","modified":"2026-10-23T18:02:58Z","fixes":[{"ecosystem":"Alpine:v3.14","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"u-boot","fixed_in":["2021.04-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"u-boot","fixed_in":["2021.07+dfsg-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"u-boot","fixed_in":["2021.07+dfsg-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"u-boot","fixed_in":["2021.07+dfsg-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.14","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.04-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.07+dfsg-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.07+dfsg-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.07+dfsg-2"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.01+dfsg-5+deb11u2"}]}],"versions":["2021.01+dfsg-5","2021.01+dfsg-5+deb11u1"],"bundled":2},{"source":"osv","ecosystem":"openEuler:20.03-LTS","package":"uboot-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.07-3.oe1"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"uboot-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2020.07-3.oe1"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2015.04+dfsg1-2ubuntu1","2015.10+dfsg1-2","2015.10+dfsg1-3","2015.10+dfsg1-4","2016.01+dfsg1-1","2016.01+dfsg1-1ubuntu1","2016.01+dfsg1-2ubuntu1","2016.01+dfsg1-2ubuntu2","2016.01+dfsg1-2ubuntu3","2016.01+dfsg1-2ubuntu5","2016.01+dfsg1-2ubuntu5+esm1","2016.01+dfsg1-2ubuntu5+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2016.03+dfsg1-6ubuntu2","2018.07~rc3+dfsg1-0ubuntu1~18.04.1","2018.07~rc3+dfsg1-0ubuntu2~18.04.1","2018.07~rc3+dfsg1-0ubuntu3~18.04.1","2019.07+dfsg-1ubuntu4~18.04.1","2020.10+dfsg-1ubuntu0~18.04.2","2020.10+dfsg-1ubuntu0~18.04.3","2020.10+dfsg-1ubuntu0~18.04.3+esm1","2020.10+dfsg-1ubuntu0~18.04.3+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"u-boot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2019.07+dfsg-1ubuntu3","2019.07+dfsg-1ubuntu5","2019.07+dfsg-1ubuntu6","2020.10+dfsg-1ubuntu0~20.04.2","2021.01+dfsg-3ubuntu0~20.04.1","2021.01+dfsg-3ubuntu0~20.04.3","2021.01+dfsg-3ubuntu0~20.04.4","2021.01+dfsg-3ubuntu0~20.04.5","2021.01+dfsg-3ubuntu0~20.04.6","2021.01+dfsg-3ubuntu0~20.04.6+esm1","2021.01+dfsg-3ubuntu0~20.04.6+esm2"]}],"products":[{"vendor":"denx","product":"u-boot"}],"references":[{"url":"https://github.com/u-boot/u-boot/commit/b6f4c757959f8850e1299a77c8e5713da78e8ec0","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/u-boot/u-boot/commit/3f04db891a353f4b127ed57279279f851c6b4917","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/u-boot/u-boot/commit/79af75f7776fc20b0d7eb6afe1e27c00fdb4b9b4","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/09/msg00037.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27138","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-grrh-mjp7-g52c"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-27138","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-27138","tags":["advisory"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1130","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27097","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-27138","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-27138","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T22:36:52Z","modified":"2025-11-03T18:07:59.724Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-13905","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T22:36:52Z","modified":"2025-11-03T18:07:59Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R","level":"high"}],"updated_at":"2026-11-02T19:49:35.000596Z"}],"ghsa":[{"id":"GHSA-grrh-mjp7-g52c","title":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2022-05-24T17:42:38Z","modified":"2025-11-03T21:31:35Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:04:18.722049Z"}],"nvd":[{"id":"CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T23:15:13.717Z","modified":"2026-06-17T03:44:19.823Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"ALPINE-CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T23:15:13.717Z","modified":"2026-10-23T17:17:56.164679594Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T23:15:13.717Z","modified":"2026-10-20T14:17:33.264624513Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"DEBIAN-CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T23:15:13.717Z","modified":"2026-10-23T18:02:58.095753976Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"OESA-2021-1130","title":"uboot-tools security update","description":"This package includes the mkimage program, which allows generation of U-Boot images in various formats, and the fw_printenv and fw_setenv programs to read and modify U-Boot's environment.\r\n\r\nSecurity Fix(es):\r\n\r\nThe boot loader in Das U-Boot before 2021.04-rc2 mishandles a modified FIT.(CVE-2021-27097)\r\n\r\nThe boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.(CVE-2021-27138)","status":"published","published":"2021-04-07T11:04:22Z","modified":"2026-08-18T01:15:26.26533432Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"UBUNTU-CVE-2021-27138","description":"The boot loader in Das U-Boot before 2021.04-rc2 mishandles use of unit addresses in a FIT.","status":"published","published":"2021-02-17T23:15:00Z","modified":"2026-10-17T12:57:13.097742414Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"DLA-4320-1","title":"u-boot - security update","status":"published","published":"2025-10-01T00:00:00Z","modified":"2025-10-01T00:17:06.295978Z","updated_at":"2026-11-02T15:46:12.7027Z"}]}}