{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "52460dda3a775a73f226312b43c0a0211e8665ea"
            },
            {
              "fixed": "653d22269a8b83b491f7f186a5d7872f14e6ddca"
            },
            {
              "fixed": "ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.17.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: validate auto buf reg before taking uring_cmd\n\nWith UBLK_F_AUTO_BUF_REG, invalid sqe-\u003eaddr can fail after\nublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is\ncompleted while the tag stays active, which can hang teardown.\n\nSplit validation from buffer apply so the check has no side effects,\nthen take the uring_cmd and store the already-validated buffer. Apply\nthe same order in FETCH so io-\u003ebuf is not written before __ublk_fetch()\nstate checks.",
  "id": "CVE-2026-90323",
  "modified": "2026-09-19T03:30:40.080770243Z",
  "published": "2026-09-17T16:08:39.434Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90323"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ublk: validate auto buf reg before taking uring_cmd"
}