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redhatRedHatRHSA-2021:3802
HistoryOct 12, 2021 - 1:21 p.m.

(RHSA-2021:3802) Important: kernel-rt security and bug fix update

2021-10-1213:21:33
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23

0.001 Low

EPSS

Percentile

23.5%

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)

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)