io_uring/zcrx: fix user_struct uaf

{
  "id": "56d52f79d8b92dcdf52975e0dc940f1c8c650940650716c01aa36b44d95b948c",
  "url": "https://osv.dev/vulnerability/CVE-2026-45995",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "io_uring/zcrx: fix user_struct uaf",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix user_struct uaf io_free_rbuf_ring() usees a struct user_struct, which io_zcrx_ifq_free() puts it down before destroying the ring.",
    "evidence": "osv:CVE-2026-45995",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.0.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45995",
      "aliases": [
        "CVE-2026-45995"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5c686456a4e83ef06c74d40be05c21a0ef136684"
                },
                {
                  "fixed": "9feb88eeda6d288f93fcfb6bca563f89e316479d"
                },
                {
                  "fixed": "0fcccfd87152f957fa8312b841f6efef42a05a20"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45995.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45995.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.561892921Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20",
        "https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45995.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45995",
        "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/2026/45xxx/CVE-2026-45995.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45995",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514455,
  "published_at": "2026-05-27T12:55:48.587+00:00"
}