--- id: CVE-2026-13622 title: >- A symlink following vulnerability was found in KubeVirt's virt-handler migration proxy summary: >- A symlink following vulnerability was found in KubeVirt's virt-handler migration proxy. During live migration, virt-handler dials Unix sockets inside the target virt-launcher pod via /proc//root/ paths using net.Dial() without symli… severity: high cvss: 8.8 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H' cwe: - CWE-22 vendor: Red Hat product: container-native-virtualization/virt-handler affected: - container-native-virtualization/virt-handler (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) - container-native-virtualization/virt-handler-rhel9 (all versions) patched: - container_native_virtualization 4.12 - container_native_virtualization 4.13 - container_native_virtualization 4.14 - container_native_virtualization 4.15 - container_native_virtualization 4.16 - container_native_virtualization 4.17 - container_native_virtualization 4.18 - container_native_virtualization 4.19 - container_native_virtualization 4.20 - container_native_virtualization 4.21 - container_native_virtualization 4.22 published: '2026-08-12' updated: '2026-09-21' sourceUpdated: '2026-09-21T17:17:32.713' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13622' references: - url: 'https://access.redhat.com/errata/RHEA-2026:53670' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:51031' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53655' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53671' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53684' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53721' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53728' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53763' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53797' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53826' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:53838' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-13622' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2494142' label: secalert@redhat.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-13622.json - url: 'https://www.cve.org/CVERecord?id=CVE-2026-13622' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13622' tags: - nvd - cve.org - csaf - vex - red-hat ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-08-13T19:21:32.127174Z' epss: 0.00201 epssPercentile: 0.08917 ingestedAt: '2026-08-16T13:39:02.667Z' --- ## Overview A symlink following vulnerability was found in KubeVirt's virt-handler migration proxy. During live migration, virt-handler dials Unix sockets inside the target virt-launcher pod via /proc//root/ paths using net.Dial() without symlink protection. These socket paths reside in qemu-owned directories writable by the virt-launcher user. An attacker with namespace edit and pods/exec permissions can replace a migration proxy socket with a symlink to the host CRI-O socket. Because virt-handler runs as root in the host mount namespace, absolute symlink targets resolve against the host filesystem, and the bidirectional io.Copy proxy relays attacker-controlled bytes to the container runtime, enabling full node compromise. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHEA-2026:53670** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.12 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHEA-2026:53670) - **RHSA-2026:53655** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.13 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53655) - **RHSA-2026:53671** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.14 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53671) - **RHSA-2026:53826** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.15 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53826) - **RHSA-2026:53721** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.16 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53721) - **RHSA-2026:53684** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.17 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53684) - **RHSA-2026:53838** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.18 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53838) - **RHSA-2026:53797** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.19 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53797) - **RHSA-2026:53763** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.20 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53763) - **RHSA-2026:53728** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.21 · released 2026-08-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:53728) - **RHSA-2026:51031** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.22 · released 2026-08-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:51031)