RHSA-2026:44004HighCVSS 7.8

Red Hat Security Advisory: kpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_53_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 security update

Published
July 23, 2026
Last Modified
October 30, 2026

🔗 CVE IDs covered (1)

CVE-2026-53359 →

📋 Description

CVE-2026-53359 — kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role

🎯 Affected products36

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-7.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-7.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-7.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-7.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-7.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-7.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-7.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-4.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-0:1-14.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-0:1-14.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-0:1-14.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-debuginfo-0:1-14.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-debuginfo-0:1-14.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-debugsource-0:1-14.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_53_1-debugsource-0:1-14.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-11.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-11.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-11.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-11.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-11.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-11.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-11.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_85_1-0:1-9.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • +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 Workaround: This vulnerability can be mitigated by disabling nested virtualization. Create a file in `/etc/modprobe.d/` with a descriptive name, such as `cve-2026-53359-mitigation.conf`. In that file, disable nested virtualization for the `kvm_intel` and `kvm_amd` kernel modules: ``` options kvm-intel nested=0 options kvm-amd nested=0 ``` Use `lsmod` to determine if either module is already loaded. If so, remove loaded modules with `modprobe -r`. To validate that nested virtualization is disabled, read the files `/sys/module/kvm_intel/parameters/nested` and `/sys/module/kvm_amd/parameters/nested`. If these modules are loaded, those files should read `N` to indicate that the feature is disabled. In OpenShift 4, a MachineConfig can be utilized to create a modprobe configuration allowing control of the module on applicable nodes. See the following article for an example. https://access.redhat.com/solutions/6979679 Red Hat OpenStack Platform 16.2 and 17.1, and Red Hat OpenStack Services on OpenShift 18.0, can be affected when their nodes run a vulnerable RHEL or OpenShift kernel. Follow the knowledge base article to apply the mitigation. https://access.redhat.com/solutions/7145295

🔗 References (4)