Security Vulnerabilities fixed in kernel-rt RHSA-2021:3802

Description

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) 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) 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): Indefinite waiting for RCU callback while removing cgroup (BZ#1967844) kernel-rt: update to the latest RHEL7.9.z9 source tree (BZ#2002994) Indefinite waiting for RCU callback while removing cgroup (BZ#1967844) kernel-rt: update to the latest RHEL7.9.z9 source tree (BZ#2002994) SolutionFor details on how to apply this update, which includes the changes described in this advisory, refer to:https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

Affected Applications

kernel-rt

CVE References

CVE-2021-3653 CVE-2021-3656 CVE-2021-22543

Other References

https://access.redhat.com/errata/RHSA-2021:3802