{"id":"RLSA-2021:5241","summary":"Moderate: 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: In Overlayfs missing a check for a negative dentry before calling vfs_rename() (CVE-2021-20321)\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-rt: update RT source tree to the Rocky Linux-8.5.z1 source tree (BZ#2023988)\n\n* [rt] Rocky Linux-8.6: disable KASAN, KCSAN and UBSAN for kernel-rt (BZ#2026384)","modified":"2026-02-05T06:00:06.552610Z","published":"2021-12-21T09:12:29Z","upstream":["CVE-2021-20321"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:5241"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2013242"}],"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":"0:4.18.0-348.7.1.rt7.137.el8_5"}],"database_specific":{"yum_repository":"RT"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:5241.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}