{"id":"RLSA-2022:0819","summary":"Important: kernel-rt security and bug fix update","details":"The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: improper initialization of the \"flags\" member of the new pipe_buffer (CVE-2022-0847)\n\n* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)\n\n* kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154)\n\n* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)\n\n* kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)\n\n* kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)\n\n* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)\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\nBug Fix(es):\n\n* kernel symbol '__rt_mutex_init' is exported GPL-only in kernel 4.18.0-348.2.1.rt7.132.el8_5 (BZ#2038423)\n\n* kernel-rt: update RT source tree to the Rocky Linux-8.5.z3 source tree (BZ#2045589)","modified":"2026-03-11T06:01:58.229911Z","published":"2022-03-10T14:37:54Z","upstream":["CVE-2021-0920","CVE-2021-4154","CVE-2022-0330","CVE-2022-0435","CVE-2022-0492","CVE-2022-0847","CVE-2022-22942"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2022:0819"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2031930"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2034514"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2042404"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2044809"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2048738"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2051505"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2060795"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.20.1.rt7.150.el8_5"}],"database_specific":{"yum_repository":"RT"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2022:0819.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}