{"id":"RLSA-2021:5227","summary":"Moderate: kernel security and bug fix update","details":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\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* panic while breaking a lease/delegation after user mode helper invocation (BZ#2010333)\n\n* The ASR driver is causing a system crash in Rocky Linux8.4 compared to Rocky Linux8.3 due to kernel changes (BZ#2016384)\n\n* Rocky Linux8: DFS provided SMB shares are not accessible following unprivileged access (BZ#2017177)\n\n* Avoid hitting the rtnl_trylock/restart_syscall logic in net-sysfs when possible (BZ#2021165)\n\n* Rocky Linux8: x86/Kconfig: Do not enable AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT (BZ#2024678)\n\n* Rocky Linux8.4-[Regression][P10][DD2.0][Rainier/Denali] - system crashed while offlining and onlining cores (BZ#2026450)","modified":"2026-02-05T01:30:08.591143Z","published":"2021-12-21T09:07:34Z","upstream":["CVE-2021-20321"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:5227"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2013242"}],"affected":[{"package":{"name":"kernel","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.el8_5"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:5227.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"}]}