RHSA-2022:5626HighCVSS 7.8

Red Hat Security Advisory: kernel security and bug fix update

Published
July 19, 2022
Last Modified
October 14, 2026

🔗 CVE IDs covered (8)

CVE-2021-47435 →CVE-2022-1012 →CVE-2022-1729 →CVE-2022-32250 →CVE-2022-49086 →CVE-2020-29368 →CVE-2021-4197 →CVE-2021-4203 →

📋 Description

CVE-2020-29368 — kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check CVE-2021-4197 — kernel: cgroup: Use open-time creds and namespace for migration perm checks CVE-2021-4203 — kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses CVE-2021-47435 — kernel: dm: fix mempool NULL pointer race when completing IO CVE-2022-1012 — kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak CVE-2022-1729 — kernel: race condition in perf_event_open leads to privilege escalation CVE-2022-32250 — kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root CVE-2022-49086 — kernel: net: openvswitch: fix leak of nested actions

🎯 Affected products122

  • Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • Red Hat Enterprise Linux CRB EUS (v.8.4)
  • bpftool-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux CRB EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux CRB EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux CRB EUS (v.8.4)
  • kernel-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-0:4.18.0-305.57.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.57.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-core-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-core-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-core-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-core-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-0:4.18.0-305.57.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-core-0:4.18.0-305.57.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-core-0:4.18.0-305.57.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • kernel-debug-core-0:4.18.0-305.57.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.4)
  • +92 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: The mitigation not known. However, for the default configuration of the Red Hat Enterprise Linux it is not possible to trigger this vulnerability: if control groups (cgroups) not being used or being used with the default configuration or being used some other configuration where for example similar privileges for all processes (both for parent and for child processes), then no way to trigger this vulnerability. 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: In order to trigger the issue, it requires the ability to create user/net namespaces. On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.

🔗 References (9)