{"id":"ALSA-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 AlmaLinux8.4 compared to AlmaLinux8.3 due to kernel changes (BZ#2016384)\n\n* AlmaLinux8: 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* AlmaLinux8: x86/Kconfig: Do not enable AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT (BZ#2024678)\n\n* AlmaLinux8.4-[Regression][P10][DD2.0][Rainier/Denali] - system crashed while offlining and onlining cores (BZ#2026450)","modified":"2026-02-04T02:53:23.103953Z","published":"2021-12-21T09:07:34Z","related":["CVE-2021-20321"],"references":[{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-20321"}],"affected":[{"package":{"name":"kernel-tools-libs-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-tools-libs-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:5227.json"}}],"schema_version":"1.7.3"}