QID 239675

Date Published: 2021-10-20

QID 239675: Red Hat Update for kernel-rt (RHSA-2021:3802)

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: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) kernel: SVM nested virtualization issue in KVM (AVIC support)
(CVE-2021-3653) kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)
(CVE-2021-3656)

Affected Products:

Red Hat Enterprise Linux for Real Time 7 x86_64
Red Hat Enterprise Linux for Real Time for NFV 7 x86_64

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as High - 6.1 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:3802 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239675

    CVE-2021-3653 | CVE-2021-3656 | CVE-2021-22543 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:3802 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:3802?language=en
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