RHSA-2026:6570MediumCVSS 7.8

Red Hat Security Advisory: kernel security update

Published
April 6, 2026
Last Modified
September 11, 2026

🔗 CVE IDs covered (4)

CVE-2025-38109 →CVE-2026-23111 →CVE-2026-23210 →CVE-2026-23231 →

📋 Description

CVE-2025-38109 — kernel: Linux kernel (net/mlx5): Use-after-free in ECVF vports unload leads to denial of service CVE-2026-23111 — kernel: Kernel: Privilege escalation or denial of service in nf_tables via inverted element activity check CVE-2026-23210 — kernel: Linux kernel: Denial of Service in ice driver due to race condition during VSI rebuild CVE-2026-23231 — kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain()

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • Red Hat Enterprise Linux Real Time (v. 9)
  • Red Hat Enterprise Linux Real Time for NFV (v. 9)
  • kernel-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-611.47.1.el9_7.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-611.47.1.el9_7.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-611.47.1.el9_7.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-611.47.1.el9_7.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-core-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-core-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-debug-devel-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-devel-matched-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-modules-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-core-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-extra-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-devel-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-devel-matched-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-modules-0:5.14.0-611.47.1.el9_7.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • +170 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: To mitigate this issue, prevent module nf_tables from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Workaround: To mitigate this vulnerability, prevent the `ice` kernel module from loading. This can be achieved by creating a blacklist file for the module. 1. Create a file named `/etc/modprobe.d/blacklist-ice.conf` with the following content: `blacklist ice` 2. Regenerate the initramfs to ensure the blacklist is applied during boot: `dracut -f -v` 3. Reboot the system for the changes to take effect. Warning: Blacklisting the `ice` module may impact network functionality if your system relies on network devices using this driver. Ensure this action is compatible with your system's requirements before proceeding. 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 7.4 and later, it is recommended to 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 (7)