RHSA-2023:4377HighCVSS 7.8

Red Hat Security Advisory: kernel security, bug fix, and enhancement 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 products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CRB (v. 9)
  • bpftool-0:7.0.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-0:7.0.0-284.25.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-0:7.0.0-284.25.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-0:7.0.0-284.25.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux CRB (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.s390x as a component of Red Hat Enterprise Linux CRB (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • bpftool-debuginfo-0:7.0.0-284.25.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux CRB (v. 9)
  • kernel-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-284.25.1.el9_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-284.25.1.el9_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-284.25.1.el9_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-284.25.1.el9_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-core-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-core-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-284.25.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-284.25.1.el9_2.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. 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)