RHSA-2023:4378HighCVSS 7.8

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

Published
August 1, 2023
Last Modified
November 7, 2026

🔗 CVE IDs covered (5)

CVE-2023-3090 →CVE-2023-35788 →CVE-2022-45869 →CVE-2023-0458 →CVE-2023-1998 →

📋 Description

CVE-2022-45869 — kernel: KVM: x86/mmu: race condition in direct_page_fault() CVE-2023-0458 — kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c CVE-2023-1998 — kernel: Spectre v2 SMT mitigations problem CVE-2023-3090 — kernel: ipvlan: out-of-bounds write caused by unclear skb->cb CVE-2023-35788 — kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()

🎯 Affected products36

  • Red Hat Enterprise Linux NFV (v. 9)
  • Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-0:5.14.0-284.25.1.rt14.310.el9_2.src as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-0:5.14.0-284.25.1.rt14.310.el9_2.src as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-debuginfo-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-devel-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-devel-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-kvm-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-modules-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-core-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debug-modules-extra-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debuginfo-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debuginfo-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-devel-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • kernel-rt-devel-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux RT (v. 9)
  • kernel-rt-kvm-0:5.14.0-284.25.1.rt14.310.el9_2.x86_64 as a component of Red Hat Enterprise Linux NFV (v. 9)
  • +6 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: This vulnerability can be mitigated by disabling the nested virtualization feature. For Intel: ``` # modprobe -r kvm_intel # modprobe kvm_intel nested=0 ``` For AMD: ``` # modprobe -r kvm_amd # modprobe kvm_amd nested=0 ``` 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: 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: This flaw can be mitigated by preventing the affected `ipvlan` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see 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 (8)