CVE-2026-13622
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 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.
Açıklama ve Etki
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 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.
Referanslar
- https://access.redhat.com/errata/RHEA-2026:53670
- https://access.redhat.com/errata/RHSA-2026:51031
- https://access.redhat.com/errata/RHSA-2026:53655
- https://access.redhat.com/errata/RHSA-2026:53671
- https://access.redhat.com/errata/RHSA-2026:53684
- https://access.redhat.com/errata/RHSA-2026:53721
- https://access.redhat.com/errata/RHSA-2026:53728
- https://access.redhat.com/errata/RHSA-2026:53763
- https://access.redhat.com/errata/RHSA-2026:53797
- https://access.redhat.com/errata/RHSA-2026:53826
- https://access.redhat.com/errata/RHSA-2026:53838
- https://access.redhat.com/security/cve/CVE-2026-13622
- https://bugzilla.redhat.com/show_bug.cgi?id=2494142
Güvenli Doğrulama Notu
Bu sayfa saldırı gerçekleştiren payload'lar çalıştırmaz. Doğrulama; etkilenen ürün/sürümün envanterden kontrol edilmesi, üretici güvenlik duyurusunun incelenmesi ve güncellemenin uygulanması üzerinden yapılmalıdır.