{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a"
            },
            {
              "fixed": "a7b33671e418fca507feebd1d56e7f4952a4b25c"
            },
            {
              "fixed": "439a6728ec4641ffad1ca796622c19bc525e570f"
            },
            {
              "fixed": "f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa"
            },
            {
              "fixed": "50ad880db3013c6fee0ef13781762a39e2e7ef83"
            },
            {
              "fixed": "97b57f69fee1b61b41acbf37e7720cac9d389fa4"
            },
            {
              "fixed": "c2c185be5c85d37215397c8e8781abf0a69bec1f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.19.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43366.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere's a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could've\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it's of the correct type. Add those\nchecks.",
  "id": "CVE-2026-43366",
  "modified": "2026-08-12T03:51:12.787954973Z",
  "published": "2026-05-08T14:21:19.191Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43366.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43366"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "io_uring/kbuf: check if target buffer list is still legacy on recycle"
}