RLSA-2021:5227

    Dashboard / Vulnerabilities / RLSA-2021:5227

    RLSA-2021:5227

    Published: 21 Dec 2021Last Modified: 5 Feb 2026
    Upstream:
    CVE-2021-20321

    Summary: Moderate: kernel security and bug fix update

    Details: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() (CVE-2021-20321) For 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. Bug Fix(es): * panic while breaking a lease/delegation after user mode helper invocation (BZ#2010333) * The ASR driver is causing a system crash in Rocky Linux8.4 compared to Rocky Linux8.3 due to kernel changes (BZ#2016384) * Rocky Linux8: DFS provided SMB shares are not accessible following unprivileged access (BZ#2017177) * Avoid hitting the rtnl_trylock/restart_syscall logic in net-sysfs when possible (BZ#2021165) * Rocky Linux8: x86/Kconfig: Do not enable AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT (BZ#2024678) * Rocky Linux8.4-[Regression][P10][DD2.0][Rainier/Denali] - system crashed while offlining and onlining cores (BZ#2026450)

    References: https://errata.rockylinux.org/RLSA-2021:5227, https://bugzilla.redhat.com/show_bug.cgi?id=2013242

    Affected packages

    Package

    Name: kernel

    Purl: pkg:rpm/rocky-linux/kernel?distro=rocky-linux-8-5-legacy&epoch=0

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:4.18.0-348.7.1.el8_5

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RLSA-2021:5227 | CVE-DB