RHSA-2023:3708HighCVSS 7.8

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

Published
June 21, 2023
Last Modified
August 6, 2026

🔗 CVE IDs covered (6)

CVE-2023-2002 →CVE-2023-2124 →CVE-2023-2194 →CVE-2023-2235 →CVE-2023-28466 →CVE-2023-32233 →

📋 Description

CVE-2023-2002 — Kernel: bluetooth: Unauthorized management command execution CVE-2023-2124 — kernel: OOB access in the Linux kernel's XFS subsystem CVE-2023-2194 — kernel: i2c: out-of-bounds write in xgene_slimpro_i2c_xfer() CVE-2023-2235 — kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events CVE-2023-28466 — kernel: tls: race condition in do_tls_getsockopt may lead to use-after-free or NULL pointer dereference CVE-2023-32233 — kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation

🎯 Affected products36

  • Red Hat Enterprise Linux NFV (v. 9)
  • Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-0:5.14.0-284.18.1.rt14.303.el9_2.src as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-0:5.14.0-284.18.1.rt14.303.el9_2.src as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-devel-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-devel-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-kvm-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-modules-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-core-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debuginfo-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debuginfo-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-devel-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-devel-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-kvm-0:5.14.0-284.18.1.rt14.303.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • +6 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: This flaw can be mitigated by preventing the i2c-xgene-slimpro module from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from being loaded automatically. Workaround: This flaw can be mitigated by preventing the affected Transport Layer Security (TLS) kernel module from loading during the boot time. Ensure the module is added into the blacklist file. ~~~ Refer: How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: 1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. 2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces: ``` # 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 the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter.

🔗 References (9)