CVE-2026-13622
Kubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allowing container escape to host
No known exploitation. EPSS puts it in the 9th percentile. Only a workaround so far.
What to do
No fixed build is published yet. The vendor describes a workaround.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 9th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
24 events over 40 days, from the signal feeds we watch.
- Workaround availablerecord updated
- Workaround availableworkaround available, record updated, record updated
- Workaround availablerecord updated
- Workaround availablerecord updated
- OpenVAS check added
- Workaround availablerecord updated
Affected products
- Red Hat Container Native Virtualization 4.12Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.13Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.14Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.15Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.16Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.17Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.18Cloud & SaaS / virtualization
- Red Hat Container Native Virtualization 4.19Cloud & SaaS / virtualization
And 3 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- access.redhat.com/errata/RHEA-2026:53670
- access.redhat.com/errata/RHSA-2026:51031
- access.redhat.com/errata/RHSA-2026:53655
And 10 more references. See all after sign-in
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