RLSA-2021:5241

    Dashboard / Vulnerabilities / RLSA-2021:5241

    RLSA-2021:5241

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

    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. 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): * kernel-rt: update RT source tree to the Rocky Linux-8.5.z1 source tree (BZ#2023988) * [rt] Rocky Linux-8.6: disable KASAN, KCSAN and UBSAN for kernel-rt (BZ#2026384)

    References: https://errata.rockylinux.org/RLSA-2021:5241, https://bugzilla.redhat.com/show_bug.cgi?id=2013242

    Affected packages

    Package

    Name: kernel-rt

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:4.18.0-348.7.1.rt7.137.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-2021:5241 | CVE-DB