io_uring/zctx: check chained notif contexts

{
  "id": "bf858ab509d5772d1d3b8a7e096010a9b24bf8d52712ff9c0a5f50f19e4d6509",
  "url": "https://osv.dev/vulnerability/CVE-2025-68317",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "io_uring/zctx: check chained notif contexts",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: io_uring/zctx: check chained notif contexts Send zc only links ubuf_info for requests coming from the same context. There are some ambiguous syz reports, so let's check the assumption on notification completion.",
    "evidence": "osv:CVE-2025-68317",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.58",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-68317",
      "aliases": [
        "CVE-2025-68317"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6fe4220912d19152a26ce19713ab232f4263018d"
                },
                {
                  "fixed": "aaafd17d3f4be2c15539359a5b4bfa00237f687f"
                },
                {
                  "fixed": "d664a3ce3a604231a0b144c152a3755d03b18b60"
                },
                {
                  "fixed": "ab3ea6eac5f45669b091309f592c4ea324003053"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68317.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
                },
                {
                  "fixed": "6.12.58"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.17.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68317.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.000291623Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/aaafd17d3f4be2c15539359a5b4bfa00237f687f",
        "https://git.kernel.org/stable/c/ab3ea6eac5f45669b091309f592c4ea324003053",
        "https://git.kernel.org/stable/c/d664a3ce3a604231a0b144c152a3755d03b18b60",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68317.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68317",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68317.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68317",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519105,
  "published_at": "2025-12-16T15:39:47.159+00:00"
}