RHSA-2026:59662HighCVSS 8.7

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Published
August 26, 2026
Last Modified
October 14, 2026

🔗 CVE IDs covered (5)

CVE-2026-43112 →CVE-2026-46099 →CVE-2026-53059 →CVE-2026-74580 →CVE-2026-31411 →

📋 Description

CVE-2026-31411 — kernel: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() CVE-2026-43112 — kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath CVE-2026-46099 — kernel: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels CVE-2026-53059 — kernel: dm log: fix out-of-bounds write due to region_count overflow CVE-2026-74580 — kernel: vhost: reset the vring metadata cache on vring reconfiguration

🎯 Affected products169

  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-0:7.0.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-0:7.0.0-284.188.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-0:7.0.0-284.188.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-0:7.0.0-284.188.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • bpftool-debuginfo-0:7.0.0-284.188.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-0:5.14.0-284.188.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-0:5.14.0-284.188.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-0:5.14.0-284.188.1.el9_2.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-0:5.14.0-284.188.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-core-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-core-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-debuginfo-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • kernel-64k-debug-debuginfo-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-devel-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • kernel-64k-debug-devel-matched-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • kernel-64k-debug-modules-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-modules-core-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • kernel-64k-debug-modules-extra-0:5.14.0-284.188.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • +139 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. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Workaround: To mitigate this issue, prevent the `cifs` kernel module from loading if CIFS client functionality is not required. This can be achieved by blacklisting the module. Create a file named `/etc/modprobe.d/blacklist-cifs.conf` with the following content: ``` blacklist cifs ``` After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. ```bash dracut -f -v reboot ``` Disabling the `cifs` module will prevent the system from mounting CIFS network shares, which may impact functionality relying on this protocol. Workaround: Prevent the vhost kernel module from loading on systems where kernel-accelerated virtio is not required. 1. Add a configuration entry in /etc/modprobe.d to disable autoloading: # echo "install vhost /bin/true" > /etc/modprobe.d/disable-vhost.conf 2. If the module is already loaded and no guests are using it, unload the vhost drivers: # modprobe -r vhost_net vhost_vsock vhost_scsi vhost Caveats: Disabling vhost prevents in-kernel acceleration for virtio networking, storage, and vsock communication, which may degrade I/O performance or cause virtual machine instances dependent on vhost devices to fail to start. Warning: A system reboot or stopping active virtual machines is required if the driver is currently loaded and actively in use.

🔗 References (7)