Security advisory

{
  "id": "1e2ad10319acf7fcc0441b23c645d5d3a9be8456d811e231feaa0543d76c27aa",
  "url": "https://osv.dev/vulnerability/CVE-2021-3735",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3735",
    "summary": "A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.",
    "evidence": "osv:CVE-2021-3735",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3735",
      "aliases": [
        "CVE-2021-3735"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/qemu/qemu",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ecf2706e271fa705621f0d5ad9517fe15a22bf22"
                },
                {
                  "last_affected": "ecf2706e271fa705621f0d5ad9517fe15a22bf22"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.1.0-rc4"
                      },
                      {
                        "last_affected": "6.1.0-rc4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.1.0-rc4",
            "v6.1.0-rc4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3735.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/qemu-project/qemu",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ecf2706e271fa705621f0d5ad9517fe15a22bf22"
                },
                {
                  "last_affected": "ecf2706e271fa705621f0d5ad9517fe15a22bf22"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.1.0-rc4"
                      },
                      {
                        "last_affected": "6.1.0-rc4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.1.0-rc4",
            "v6.1.0-rc4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3735.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:31.704127642Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/security/cve/CVE-2021-3735",
        "https://security-tracker.debian.org/tracker/CVE-2021-3735",
        "https://security.netapp.com/advisory/ntap-20250228-0009/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1997184"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  },
                  {
                    "introduced": "11.0"
                  },
                  {
                    "last_affected": "11.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3735",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432868,
  "published_at": "2022-08-26T16:15:09.467+00:00"
}