{"id":"CVE-2021-20269","aliases":["EUVD-2021-7704","GHSA-55h9-m2g5-r4xm","OESA-2022-1825","RHSA-2021:4404","RLSA-2021:4404"],"status":"published","title":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a...","description":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00252,"percentile":0.16817,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-276"],"published":"2021-11-09T09:17:49Z","modified":"2026-08-18T01:16:24Z","fixes":[{"ecosystem":"openEuler:20.03-LTS-SP1","package":"kexec-tools","fixed_in":["2.0.20-16.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP3","package":"kexec-tools","fixed_in":["2.0.20-18.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS","package":"kexec-tools","fixed_in":["2.0.23-5.oe2203"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools","fixed_in":["0:2.0.20-57.el8"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools-debuginfo","fixed_in":["0:2.0.20-57.el8"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools-debugsource","fixed_in":["0:2.0.20-57.el8"],"sources":["osv"]},{"ecosystem":"Rocky Linux:8","package":"kexec-tools","fixed_in":["0:2.0.20-57.el8"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"kexec-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.20-16.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP3","package":"kexec-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.20-18.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS","package":"kexec-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.23-5.oe2203"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.0.20-57.el8"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools-debuginfo","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.0.20-57.el8"}]}]},{"source":"osv","ecosystem":"Red Hat:enterprise_linux:8::baseos","package":"kexec-tools-debugsource","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.0.20-57.el8"}]}]},{"source":"osv","ecosystem":"Rocky Linux:8","package":"kexec-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.0.20-57.el8"}]}]}],"products":[{"vendor":"kexec-tools_project","product":"kexec-tools"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1934261","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20269","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:4404","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-20269","tags":["report"]},{"url":"https://github.com/advisories/GHSA-55h9-m2g5-r4xm"},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1825","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#low","tags":["article"]},{"url":"https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1892558","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1915819","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1918499","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1965267","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_4404.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20269","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2021:4404","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-20269","description":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.","status":"published","published":"2022-03-09T16:29:47Z","modified":"2024-08-03T17:37:23.203Z","cwes":["CWE-276"],"updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-7704","description":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.","status":"published","published":"2022-03-09T16:29:47Z","modified":"2024-08-03T17:37:23Z","updated_at":"2026-11-03T03:25:09.355483Z"}],"ghsa":[{"id":"GHSA-55h9-m2g5-r4xm","title":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a...","description":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.","status":"published","published":"2022-03-11T00:02:34Z","modified":"2023-02-10T05:05:55Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:54:00.189984Z"}],"nvd":[{"id":"CVE-2021-20269","description":"A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.","status":"published","published":"2022-03-10T17:41:27.46Z","modified":"2026-06-17T03:33:34.71Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:07:05.198719Z"}],"osv":[{"id":"OESA-2022-1825","title":"kexec-tools security update","description":"kexec-tools provides /sbin/kexec binary that facilitates a new kernel to boot using the kernel\u0026apos;s kexec feature either on a normal or a panic reboot. This package contains the /sbin/kexec binary and ancillary utilities that together form the userspace component of the kernel\u0026apos;s kexec feature.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.(CVE-2021-20269)","status":"published","published":"2022-08-13T11:05:05Z","modified":"2026-08-18T01:16:24.759706714Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:39.528805Z"},{"id":"RHSA-2021:4404","title":"Red Hat Security Advisory: kexec-tools security, bug fix, and enhancement update","status":"published","published":"2024-09-16T05:52:12Z","modified":"2026-06-29T10:38:01Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RLSA-2021:4404","title":"Low: kexec-tools security, bug fix, and enhancement update","description":"The kexec-tools packages contain the /sbin/kexec binary and utilities that together form the user-space component of the kernel's kexec feature. The /sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec feature either on a normal or a panic reboot. The kexec fastboot mechanism allows booting a Linux kernel from the context of an already running kernel. \n\nSecurity Fix(es):\n\n* kexec-tools: incorrect permissions on kdump dmesg file (CVE-2021-20269)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.5 Release Notes linked from the References section.","status":"published","published":"2021-11-09T09:17:49Z","modified":"2026-02-04T07:40:22.15496Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:53:23.969672Z"}]}}