golang-gvisor-gvisor — security advisory

{
  "id": "6a17841ddeabb0e4445f9c195a1a634d4fc198eb45a9ef51a96627631e2ac257",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-95702",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-95702",
    "summary": "Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The sentry process remains confined by host-level Linux seccomp and namespace boundaries.",
    "evidence": "osv:UBUNTU-CVE-2026-95702",
    "products": [
      {
        "name": {
          "value": "golang-gvisor-gvisor",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~20230807.0-4build1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.0~20230807.0-4ubuntu0.24.04.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.0~20230807.0-4ubuntu0.24.04.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.0~20230807.0-4ubuntu0.24.04.3",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-gvisor-gvisor",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~20240729.0-7",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-gvisor-gvisor",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.0~20240729.0-4",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.0~20240729.0-5",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.0~20240729.0-7",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-95702",
      "aliases": [
        "UBUNTU-CVE-2026-95702"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-gvisor-gvisor",
            "purl": "pkg:deb/ubuntu/golang-gvisor-gvisor?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "0.0~20230807.0-4build1",
            "0.0~20230807.0-4ubuntu0.24.04.1",
            "0.0~20230807.0-4ubuntu0.24.04.2",
            "0.0~20230807.0-4ubuntu0.24.04.3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95702.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-gvisor-gvisor-dev",
                "binary_version": "0.0~20230807.0-4ubuntu0.24.04.3"
              },
              {
                "binary_name": "runsc",
                "binary_version": "0.0~20230807.0-4ubuntu0.24.04.3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-gvisor-gvisor",
            "purl": "pkg:deb/ubuntu/golang-gvisor-gvisor?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "0.0~20240729.0-7"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95702.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-gvisor-gvisor-dev",
                "binary_version": "0.0~20240729.0-7"
              },
              {
                "binary_name": "runsc",
                "binary_version": "0.0~20240729.0-7"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-gvisor-gvisor",
            "purl": "pkg:deb/ubuntu/golang-gvisor-gvisor?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "0.0~20240729.0-4",
            "0.0~20240729.0-5",
            "0.0~20240729.0-7"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95702.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "golang-gvisor-gvisor-dev",
                "binary_version": "0.0~20240729.0-7"
              },
              {
                "binary_name": "runsc",
                "binary_version": "0.0~20240729.0-7"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:01:19.593657119Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-95702"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-95702",
        "https://www.cve.org/CVERecord?id=CVE-2026-95702",
        "https://github.com/google/gvisor/commit/25c75149bc0eeaa6a3a49b9bbe3473588b2af6df",
        "https://github.com/google/gvisor/commit/90bc4fc36fe442257a06ba15df00371561c183ed",
        "https://github.com/google/gvisor/commit/e4efb89c787ef15b09e68d561f1303380e1d5a77"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-95702",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 361692,
  "published_at": "2026-10-09T15:17:00+00:00"
}