{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "34"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "35"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "9.0"
              }
            ]
          }
        ]
      },
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.2.0"
              },
              {
                "fixed": "3.2.18"
              },
              {
                "introduced": "3.4.0"
              },
              {
                "fixed": "3.4.10"
              }
            ]
          },
          "events": [
            {
              "introduced": "e0ed4cfa3d72110257da54c26ad3a28d282ef454"
            },
            {
              "fixed": "ddf8072b76718f59b84a968e1cf206212f6e2d01"
            },
            {
              "introduced": "9733f173ea5e6255e8da208ef183210aa264d948"
            },
            {
              "fixed": "733b3a137c2ba8c8e517e5fb37bcc3030a43d603"
            }
          ],
          "repo": "https://github.com/wireshark/wireshark",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "NULL pointer exception in the IEEE 802.11 dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file",
  "id": "CVE-2021-39928",
  "modified": "2026-03-15T21:49:08.771490804Z",
  "published": "2021-11-18T19:15:08.467Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://security.gentoo.org/glsa/202210-04"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.debian.org/security/2021/dsa-5019"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.wireshark.org/security/wnpa-sec-2021-13.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39928.json"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/wireshark/wireshark/-/issues/17704"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}