RHEA-2026:53670

Vulnerability from csaf_redhat - Published: 2026-08-11 17:00 - Updated: 2026-08-14 10:31
Summary
Red Hat Enhancement Advisory: OpenShift Virtualization v4.12 Images
Severity
Important
Notes
Topic: Red Hat OpenShift Virtualization release v4.12 is now available with updates to packages and images that fix several bugs and add enhancements.
Details: OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. This advisory contains OpenShift Virtualization v4.12 images.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

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.

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-handler@sha256:97a474d86d9e3907a0c16de48d0d13e43c0cf2f22161ea60c6df19e37c519df7_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/libguestfs-tools@sha256:5c0fe47c22b92a32d7779ea5c7707a4fc74aebbe04b852e27535983f6fa2667c_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-api@sha256:2872ea0e0ac41a1419e31341909f64c4420fdedf96e504928e087ac017ec7323_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-artifacts-server@sha256:4882a54e614fbe8d79f71845a64ad74d128c8355fb4d824974b823a3d1468eb7_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-controller@sha256:817da590f3b5c4054a8b190cd1eda971dafea465a10c8f5b0e3db2fa4e0d444c_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportproxy@sha256:6b1ba5980098dab51cc53f62bf6f96dc9971d48d949057c231f65ba70217fbcd_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportserver@sha256:81f9e77dc20eaceabb2cfaca627002adc65136d7a08c6837a3b259b9ac417d27_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-launcher@sha256:52938c4bb6f73c485db89bb3703a0499fd2cc969e29e2f7587d43447725cf396_amd64
Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64
Workaround
Threats
Impact Important

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      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64 as a component of Red Hat Container Native Virtualization 4.12",
          "product_id": "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64"
        },
        "product_reference": "registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64",
        "relates_to_product_reference": "Red Hat Container Native Virtualization 4.12"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Huzaifa Sidhpurwala"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2026-13622",
      "cwe": {
        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
      },
      "discovery_date": "2026-06-29T10:07:50.206000+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/libguestfs-tools@sha256:5c0fe47c22b92a32d7779ea5c7707a4fc74aebbe04b852e27535983f6fa2667c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-api@sha256:2872ea0e0ac41a1419e31341909f64c4420fdedf96e504928e087ac017ec7323_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-artifacts-server@sha256:4882a54e614fbe8d79f71845a64ad74d128c8355fb4d824974b823a3d1468eb7_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-controller@sha256:817da590f3b5c4054a8b190cd1eda971dafea465a10c8f5b0e3db2fa4e0d444c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportproxy@sha256:6b1ba5980098dab51cc53f62bf6f96dc9971d48d949057c231f65ba70217fbcd_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportserver@sha256:81f9e77dc20eaceabb2cfaca627002adc65136d7a08c6837a3b259b9ac417d27_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-launcher@sha256:52938c4bb6f73c485db89bb3703a0499fd2cc969e29e2f7587d43447725cf396_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64"
          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2494142"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A symlink following vulnerability was found in KubeVirt\u0027s virt-handler migration proxy. During live migration, virt-handler dials Unix sockets inside the target virt-launcher pod via /proc/\u003cpid\u003e/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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allowing container escape to host",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat has rated this vulnerability as Important impact. The vulnerable code is in the virt-handler component, a privileged DaemonSet running as root in the host mount namespace on every compute node. Its migration proxy dials Unix sockets inside target virt-launcher pods via /proc/\u003cpid\u003e/root/ using net.Dial(), which follows symbolic links. Because virt-handler operates in the host mount namespace, absolute symlink targets resolve against the host root filesystem, enabling container-to-host escape.\n\nExploitation requires an authenticated user with namespace-level edit permissions (kubevirt.io:edit) and pods/exec access \u2014 standard permissions for VM operators. The impact of successful exploitation is complete node compromise via CRI-O socket access, bypassing all Kubernetes admission controls.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-handler@sha256:97a474d86d9e3907a0c16de48d0d13e43c0cf2f22161ea60c6df19e37c519df7_amd64"
        ],
        "known_not_affected": [
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/libguestfs-tools@sha256:5c0fe47c22b92a32d7779ea5c7707a4fc74aebbe04b852e27535983f6fa2667c_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-api@sha256:2872ea0e0ac41a1419e31341909f64c4420fdedf96e504928e087ac017ec7323_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-artifacts-server@sha256:4882a54e614fbe8d79f71845a64ad74d128c8355fb4d824974b823a3d1468eb7_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-controller@sha256:817da590f3b5c4054a8b190cd1eda971dafea465a10c8f5b0e3db2fa4e0d444c_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportproxy@sha256:6b1ba5980098dab51cc53f62bf6f96dc9971d48d949057c231f65ba70217fbcd_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportserver@sha256:81f9e77dc20eaceabb2cfaca627002adc65136d7a08c6837a3b259b9ac417d27_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-launcher@sha256:52938c4bb6f73c485db89bb3703a0499fd2cc969e29e2f7587d43447725cf396_amd64",
          "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-13622"
        },
        {
          "category": "external",
          "summary": "RHBZ#2494142",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2494142"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-13622",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-13622"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-13622",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13622"
        }
      ],
      "release_date": "2026-08-12T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-11T17:00:16+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-handler@sha256:97a474d86d9e3907a0c16de48d0d13e43c0cf2f22161ea60c6df19e37c519df7_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHEA-2026:53670"
        },
        {
          "category": "workaround",
          "details": "Restrict pods/exec permissions in namespaces that run virtual machines. The pods/exec RBAC permission is required for the attack \u2014 removing it from VM operator roles prevents exploitation. \n\nAdditionally, enable Kubernetes audit logging and monitor for kubectl exec commands targeting virt-launcher pods, especially during live migration events.",
          "product_ids": [
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/libguestfs-tools@sha256:5c0fe47c22b92a32d7779ea5c7707a4fc74aebbe04b852e27535983f6fa2667c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-api@sha256:2872ea0e0ac41a1419e31341909f64c4420fdedf96e504928e087ac017ec7323_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-artifacts-server@sha256:4882a54e614fbe8d79f71845a64ad74d128c8355fb4d824974b823a3d1468eb7_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-controller@sha256:817da590f3b5c4054a8b190cd1eda971dafea465a10c8f5b0e3db2fa4e0d444c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportproxy@sha256:6b1ba5980098dab51cc53f62bf6f96dc9971d48d949057c231f65ba70217fbcd_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportserver@sha256:81f9e77dc20eaceabb2cfaca627002adc65136d7a08c6837a3b259b9ac417d27_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-handler@sha256:97a474d86d9e3907a0c16de48d0d13e43c0cf2f22161ea60c6df19e37c519df7_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-launcher@sha256:52938c4bb6f73c485db89bb3703a0499fd2cc969e29e2f7587d43447725cf396_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/libguestfs-tools@sha256:5c0fe47c22b92a32d7779ea5c7707a4fc74aebbe04b852e27535983f6fa2667c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-api@sha256:2872ea0e0ac41a1419e31341909f64c4420fdedf96e504928e087ac017ec7323_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-artifacts-server@sha256:4882a54e614fbe8d79f71845a64ad74d128c8355fb4d824974b823a3d1468eb7_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-controller@sha256:817da590f3b5c4054a8b190cd1eda971dafea465a10c8f5b0e3db2fa4e0d444c_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportproxy@sha256:6b1ba5980098dab51cc53f62bf6f96dc9971d48d949057c231f65ba70217fbcd_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-exportserver@sha256:81f9e77dc20eaceabb2cfaca627002adc65136d7a08c6837a3b259b9ac417d27_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-handler@sha256:97a474d86d9e3907a0c16de48d0d13e43c0cf2f22161ea60c6df19e37c519df7_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-launcher@sha256:52938c4bb6f73c485db89bb3703a0499fd2cc969e29e2f7587d43447725cf396_amd64",
            "Red Hat Container Native Virtualization 4.12:registry.redhat.io/container-native-virtualization/virt-operator@sha256:f64afe86104f04f0cab7fa3c489c6939b5bb92914d50341cb2f656cea7eb298f_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kubevirt: virt-handler-rhel9: kubevirt: virt-handler migration proxy follows symlinks allowing container escape to host"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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