Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs

{
  "id": "c518aa71bbf5005ad2af706ad5d2a4ccf6ab42513b435d7b22e59f538c0f60ec",
  "url": "https://osv.dev/vulnerability/CVE-2026-88264",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs",
    "summary": "A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.",
    "evidence": "osv:CVE-2026-88264",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-88264",
      "aliases": [
        "CVE-2026-88264"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/containers/crun",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "f0d911de5587342cfeb16473bf32ecdfeaf25957"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.29.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.29.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.29.1",
            "1.27",
            "1.5",
            "1.0",
            "0.12.1",
            "0.10.6",
            "0.10.5",
            "0.10.4",
            "0.10.3",
            "0.10.2",
            "0.10.1",
            "0.10",
            "0.9.1",
            "0.9",
            "0.8",
            "0.7",
            "0.6",
            "0.5",
            "0.4",
            "v0.3",
            "v0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88264.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.165465269Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://catalog.redhat.com/software/containers/",
        "https://github.com/containers/crun/",
        "https://access.redhat.com/errata/RHSA-2026:71668",
        "https://access.redhat.com/security/cve/CVE-2026-88264",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88264.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-88264",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2531223",
        "https://github.com/containers/crun"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-59"
        ],
        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.30-1.hum1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88264.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-88264",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492008,
  "published_at": "2026-09-10T08:40:36.527+00:00"
}