RHSA-2026:94508CriticalCVSS 9.8

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

Published
November 3, 2026
Last Modified
November 12, 2026

🔗 CVE IDs covered (8)

CVE-2026-98432 →CVE-2026-99284 →CVE-2025-39797 →CVE-2025-71066 →CVE-2026-63974 →CVE-2026-64534 →CVE-2026-74556 →CVE-2026-89481 →

📋 Description

CVE-2025-39797 — kernel: xfrm: Duplicate SPI Handling CVE-2025-71066 — kernel: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change CVE-2026-63974 — kernel: Bluetooth: hci_sync: Set HCI_CMD_DRAIN_WORKQUEUE during device close CVE-2026-64534 — kernel: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path CVE-2026-74556 — kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer CVE-2026-89481 — kernel: nvme-tcp: fix host memory disclosure on R2T for a read command CVE-2026-98432 — kernel: ipv4: free inet_opt and ireq_opt after an RCU grace period CVE-2026-99284 — kernel: kernel: privilege escalation via missing shared fragment flag in skb_zerocopy

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)
  • kernel-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-0:6.12.0-55.117.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-0:6.12.0-55.117.1.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-0:6.12.0-55.117.1.el10_0.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-0:6.12.0-55.117.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-core-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-core-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 10.0)
  • kernel-64k-debug-devel-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-debug-devel-matched-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-debug-modules-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-modules-core-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debug-modules-extra-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • kernel-64k-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • kernel-64k-debuginfo-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v. 10.0)
  • kernel-64k-devel-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-devel-matched-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • kernel-64k-modules-0:6.12.0-55.117.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • +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. 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, disable the Bluetooth service if it is not required. To disable the Bluetooth service: `sudo systemctl stop bluetooth` `sudo systemctl disable bluetooth` Alternatively, prevent the `bluetooth` kernel module from loading by creating a file `/etc/modprobe.d/bluetooth.conf` with the content `blacklist bluetooth`. Then, regenerate the initramfs using `sudo dracut -f -v`. A system reboot is required for the module blacklisting to take effect. Disabling Bluetooth may impact functionality that relies on Bluetooth connectivity. Workaround: If NVMe over TCP target functionality is not required, the vulnerable code path can be avoided by not loading or by blacklisting the nvmet-tcp kernel module. For systems where NVMe/TCP targets are needed, restrict access to trusted initiators via host NQN allowlists and network segmentation to reduce the attack surface. Workaround: If iSCSI initiator functionality is not required, prevent the `libiscsi_tcp` kernel module from loading by blacklisting it. Create a file such as `/etc/modprobe.d/blacklist-iscsi.conf` with the content `blacklist libiscsi_tcp`. A system reboot is required for this change to take effect. This may impact systems relying on iSCSI storage. Workaround: Prevent the nvme-tcp kernel module from loading if NVMe over TCP storage is not required on the system. 1. Add an entry to /etc/modprobe.d to prevent the module from loading: # echo "install nvme-tcp /bin/true" >> /etc/modprobe.d/disable-nvme-tcp.conf 2. If the module is currently loaded and not in use by any storage target, unload it: # modprobe -r nvme-tcp Caveats: Disabling this module prevents the system from connecting to NVMe over TCP block storage devices. Warning: Do not attempt to unload this module if active NVMe over TCP storage is mounted or in use, as doing so will cause I/O failure and potential data loss. If the module cannot be cleanly unloaded, a system restart is required for the change to take full effect. Additionally, restrict NVMe-oF connections to verified, trusted storage targets over isolated or encrypted network fabrics. Workaround: See the security bulletin for a detailed mitigation procedure. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

🔗 References (11)