RHSA-2022:0821HighCVSS 7.8

Red Hat Security Advisory: kernel-rt security and bug fix update

Published
March 10, 2022
Last Modified
August 7, 2026

🔗 CVE IDs covered (5)

CVE-2021-4083 →CVE-2022-0330 →CVE-2022-0492 →CVE-2022-0847 →CVE-2022-22942 →

📋 Description

CVE-2021-4083 — kernel: fget: check that the fd still exists after getting a ref to it CVE-2022-0330 — kernel: possible privileges escalation due to missing TLB flush CVE-2022-0492 — kernel: cgroups v1 release_agent feature may allow privilege escalation CVE-2022-0847 — kernel: improper initialization of the "flags" member of the new pipe_buffer CVE-2022-22942 — kernel: failing usercopy allows for use-after-free exploitation

🎯 Affected products32

  • Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-0:4.18.0-193.79.1.rt13.129.el8_2.src as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-0:4.18.0-193.79.1.rt13.129.el8_2.src as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-core-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-core-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-core-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-core-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-debuginfo-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-debuginfo-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-devel-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-devel-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-kvm-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-modules-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-modules-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debug-modules-extra-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debug-modules-extra-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debuginfo-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debuginfo-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-devel-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-devel-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-kvm-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • kernel-rt-modules-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 8.2)
  • kernel-rt-modules-0:4.18.0-193.79.1.rt13.129.el8_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2)
  • +2 more not shown

✅ Remediation

For 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. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: Currently there is no mitigation available for this flaw. Customers should update to fixed packages, once they are available. Workaround: Mitigation for this issue is to skip loading the affected module vmwgfx onto the system until we have a fix available. This can be done by a blacklist mechanism and ensures the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~

🔗 References (9)