CWE
416
Advisory Published
Advisory Published

RHSA-2022:6991: Important: kernel-rt security and bug fix update

First published: Tue Oct 18 2022(Updated: )

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> A use-after-free in cls_route filter implementation may lead to privilege escalation (CVE-2022-2588)</li> <li> Information leak in the IPv6 implementation (CVE-2021-45485)</li> <li> Information leak in the IPv4 implementation (CVE-2021-45486)</li> <li> Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123)</li> <li> Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)</li> <li> Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166)</li> 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.<br>Bug Fix(es):<br><li> update RT source tree to the RHEL-8.4.z12 source tree (BZ#2119160)</li> <li> using __this_cpu_add() in preemptible [00000000] - caller is __mod_memcg_lruvec_state+0x69/0x1c0 [None8.4.0.z] (BZ#2124454)</li>

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-core<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-core<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-debuginfo<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-devel<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-modules<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-modules-extra<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debuginfo<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-devel<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-modules<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-modules-extra<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-debug-kvm<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4
redhat/kernel-rt-kvm<4.18.0-305.65.1.rt7.137.el8_4
4.18.0-305.65.1.rt7.137.el8_4

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Frequently Asked Questions

  • What is the severity of RHSA-2022:6991?

    The severity of RHSA-2022:6991 is classified as critical due to the potential for privilege escalation.

  • How do I fix RHSA-2022:6991?

    To fix RHSA-2022:6991, update to kernel-rt package version 4.18.0-305.65.1.rt7.137.el8_4 or newer.

  • What vulnerability does RHSA-2022:6991 address?

    RHSA-2022:6991 addresses a use-after-free vulnerability in the cls_route filter implementation.

  • Which systems are affected by RHSA-2022:6991?

    RHSA-2022:6991 affects systems using the Real Time Linux Kernel with specific version constraints.

  • Is there a specific package version required for RHSA-2022:6991 mitigation?

    Yes, for mitigation of RHSA-2022:6991, the specific package version required is 4.18.0-305.65.1.rt7.137.el8_4.

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