{"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/<pid>/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":0.08858,"ingestedAt":"2026-08-16T13:39:02.667Z","slug":"CVE-2026-13622","body":"## Overview\n\nA 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/<pid>/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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}