RLSA-2021:3440

    Dashboard / Vulnerabilities / RLSA-2021:3440

    RLSA-2021:3440

    Published: 7 Sept 2021Last Modified: 5 Feb 2026
    Upstream:
    CVE-2021-38201

    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: slab-out-of-bounds access in xdr_set_page_base() in net/sunrpc/xdr.c (CVE-2021-38201) 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): * OSLAT spikes on subset of cpus (BZ#1986063) * kernel-rt: update RT source tree to the Rocky Linux-8.4.z source tree (BZ#1990013) * Failure to enter full_nohz due to needless SCHED softirqs (BZ#1990272) * kernel-rt: Make rcu_normal_after_boot writable (BZ#1995431)

    References: https://errata.rockylinux.org/RLSA-2021:3440, https://bugzilla.redhat.com/show_bug.cgi?id=1992731

    Affected packages

    Package

    Name: kernel-rt

    Purl: pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8-4-legacy&epoch=0

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0:4.18.0-305.17.1.rt7.89.el8_4

    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-2021:3440 | CVE-DB