RHSA-2026:98114HighCVSS 7.5

Red Hat Security Advisory: kernel security update

Published
November 11, 2026
Last Modified
November 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-97417 →

📋 Description

CVE-2026-97417 — kernel: netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack()

🎯 Affected products58

  • Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-0:2.6.32-754.67.1.el6.src as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-abi-whitelists-0:2.6.32-754.67.1.el6.noarch as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-debuginfo-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debug-devel-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-devel-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debug-devel-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debuginfo-common-i686-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-common-i686-0:2.6.32-754.67.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debuginfo-common-s390x-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • kernel-debuginfo-common-s390x-0:2.6.32-754.67.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • kernel-debuginfo-common-x86_64-0:2.6.32-754.67.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • +28 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: Systems that do not require stateful firewall, NAT, or connection tracking can eliminate exposure by unloading the nf_conntrack kernel module. On systems where conntrack is required, exposure can be reduced by applying NOTRACK rules in the raw table to bypass connection tracking on untrusted or internet-facing interfaces, ensuring the vulnerable TCP SACK parsing code path in tcp_sack() is not reached for attacker-controlled traffic.

🔗 References (4)