{"id":"RLSA-2021:4088","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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)\n\n* kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)\n\n* kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)\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-8.4.z source tree (BZ#2004117)","modified":"2026-02-04T09:00:08.468480Z","published":"2021-11-02T09:33:51Z","upstream":["CVE-2020-36385","CVE-2021-0512","CVE-2021-3656"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:4088"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1974319"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1974491"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1983988"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-305.25.1.rt7.97.el8_4"}],"database_specific":{"yum_repository":"RT"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4088.json"}}],"schema_version":"1.7.3","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"}]}