RHSA-2023:5603HighCVSS 7.8

Red Hat Security Advisory: kernel-rt security and bug fix update

Published
October 10, 2023
Last Modified
October 15, 2026

🔗 CVE IDs covered (8)

CVE-2023-28327 →CVE-2023-31248 →CVE-2023-35001 →CVE-2023-35788 →CVE-2023-1206 →CVE-2023-1998 →CVE-2023-3161 →CVE-2023-4128 · pending

📋 Description

CVE-2023-1206 — kernel: hash collisions in the IPv6 connection lookup table CVE-2023-1998 — kernel: Spectre v2 SMT mitigations problem CVE-2023-3161 — kernel: fbcon: shift-out-of-bounds in fbcon_set_font() CVE-2023-4128 — kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route CVE-2023-28327 — kernel: denial of service problem in net/unix/diag.c CVE-2023-31248 — kernel: nf_tables: use-after-free in nft_chain_lookup_byid() CVE-2023-35001 — kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() CVE-2023-35788 — kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()

🎯 Affected products32

  • Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.src as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.src as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-kvm-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debug-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debug-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-kvm-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • kernel-rt-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.0)
  • kernel-rt-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
  • +2 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: https://access.redhat.com/solutions/30453 Workaround: This flaw can be mitigated by disabling Simultaneous Multithreading (SMT). For instructions on how to disable SMT in RHEL, please see https://access.redhat.com/solutions/rhel-smt. 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, it is possible to prevent the affected code from being loaded by blacklisting the kernel netfilter module. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 Workaround: This flaw can be mitigated by preventing the affected `cls_flower` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

🔗 References (11)