RHSA-2026:1946HighCVSS 7.5

Red Hat Security Advisory: kernel-rt security update

Published
February 4, 2026
Last Modified
August 4, 2026

🔗 CVE IDs covered (4)

CVE-2022-50865 →CVE-2023-53751 →CVE-2025-40248 →CVE-2025-68301 →

📋 Description

CVE-2022-50865 — kernel: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() CVE-2023-53751 — kernel: Linux kernel (CIFS): Use-after-free vulnerability allows data integrity compromise and denial of service CVE-2025-40248 — kernel: Linux kernel: vsock vulnerability may lead to memory corruption CVE-2025-68301 — kernel: net: atlantic: fix fragment overflow handling in RX path

🎯 Affected products36

  • Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-0:5.14.0-284.155.1.rt14.440.el9_2.src as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-0:5.14.0-284.155.1.rt14.440.el9_2.src as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-devel-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-devel-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-kvm-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-modules-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-modules-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-modules-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-modules-core-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debuginfo-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debuginfo-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-devel-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.2)
  • kernel-rt-devel-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • kernel-rt-kvm-0:5.14.0-284.155.1.rt14.440.el9_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)
  • +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: To mitigate this issue, prevent the `cifs` kernel module from loading if CIFS functionality is not required. Create a file named `/etc/modprobe.d/disable-cifs.conf` with the following content: ``` install cifs /bin/true ``` This will prevent the `cifs` module from being loaded automatically. A system reboot is required for this change to take effect. Note that disabling the `cifs` module will prevent the system from mounting CIFS shares. Workaround: To mitigate this issue, prevent the atlantic module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.

🔗 References (7)