RHSA-2026:70459HighCVSS 8.8

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

Published
September 23, 2026
Last Modified
September 28, 2026

🔗 CVE IDs covered (13)

CVE-2026-68156 →CVE-2026-68391 →CVE-2026-72072 →CVE-2026-74518 →CVE-2025-39964 →CVE-2026-45894 →CVE-2026-53062 →CVE-2026-68157 →CVE-2026-68188 →CVE-2026-68293 →CVE-2026-45959 →CVE-2026-63823 →CVE-2026-68155 →

📋 Description

CVE-2025-39964 — kernel: crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg CVE-2026-45894 — kernel: iommu/vt-d: Clear Present bit before tearing down PASID entry CVE-2026-45959 — kernel: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree CVE-2026-53062 — kernel: dm cache policy smq: fix missing locks in invalidating cache blocks CVE-2026-63823 — kernel: keys: Pin request_key_auth payload in instantiate paths CVE-2026-68155 — kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps CVE-2026-68156 — kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update CVE-2026-68157 — kernel: Linux kernel: libceph null pointer dereference leads to denial of service CVE-2026-68188 — kernel: Linux kernel Bluetooth RFCOMM: Denial of Service via use-after-free in set_termios CVE-2026-68293 — kernel: net/mlx5: Fix MCIA register buffer overflow on 32 dword reads CVE-2026-68391 — kernel: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds CVE-2026-72072 — kernel: net/mlx5e: macsec: fix use-after-free of metadata_dst on RX SC delete CVE-2026-74518 — kernel: mm/hugetlb: fix list corruption in allocate_file_region_entries()

🎯 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-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.50.1.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.50.1.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.50.1.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-687.50.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-core-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-core-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-debug-devel-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-devel-matched-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-modules-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-core-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-extra-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-devel-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-devel-matched-0:5.14.0-687.50.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-modules-0:5.14.0-687.50.1.el9_8.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. 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: 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. Workaround: To mitigate this vulnerability, prevent the `ceph` kernel module from loading if Ceph client functionality is not in use. Create a file `/etc/modprobe.d/ceph.conf` with `install ceph /bin/true`. If the module is currently loaded, unload it using `rmmod ceph`. A system reboot is required for the changes to take full effect and ensure the module is not reloaded. Unloading the `ceph` module will impact systems actively using Ceph client features. Workaround: To prevent the `rfcomm` kernel module from loading, create a modprobe configuration file. Add the following lines to `/etc/modprobe.d/disable-rfcomm.conf`: ``` install rfcomm /bin/true blacklist rfcomm ``` After saving the file, regenerate the initramfs and reboot the system for the changes to take effect. This action will disable Bluetooth RFCOMM functionality. If the module is currently loaded, unload it with `rmmod rfcomm`; however, a system reboot is recommended to ensure the module is not loaded.

🔗 References (16)