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ubuntu-cve-2026-20213
Vulnerability from osv_ubuntu
Published
2026-07-02 00:00
Modified
2026-07-09 15:15
Summary
Details

A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PE files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PE content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
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            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@0.103.9+dfsg-0ubuntu0.14.04.1+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
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            {
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            }
          ],
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        }
      ],
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        "0.98.1+dfsg-1ubuntu5",
        "0.98.1+dfsg-2ubuntu2",
        "0.98.1+dfsg-4ubuntu1",
        "0.98.1+dfsg-4ubuntu1.1",
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        "0.100.1+dfsg-1ubuntu0.14.04.2",
        "0.100.1+dfsg-1ubuntu0.14.04.3",
        "0.100.1+dfsg-1ubuntu0.14.04.4",
        "0.100.2+dfsg-1ubuntu0.14.04.1",
        "0.100.2+dfsg-1ubuntu0.14.04.2",
        "0.100.3+dfsg-0ubuntu0.14.04.1",
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        "0.101.4+dfsg-0ubuntu0.14.04.1+esm1",
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        "0.102.2+dfsg-0ubuntu0.14.04.1+esm1",
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        "0.102.4+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.2+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.2+dfsg-0ubuntu0.14.04.1+esm2",
        "0.103.5+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.6+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.8+dfsg-0ubuntu0.14.04.1+esm1",
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
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          },
          {
            "binary_name": "clamav-base",
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          },
          {
            "binary_name": "clamav-daemon",
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          },
          {
            "binary_name": "clamav-docs",
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          },
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            "binary_name": "clamav-milter",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          }
        ]
      },
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      },
      "ranges": [
        {
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            {
              "introduced": "0"
            }
          ],
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        }
      ],
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        "0.98.7+dfsg-0ubuntu5",
        "0.99+dfsg-1ubuntu1",
        "0.99+dfsg-1ubuntu1.1",
        "0.99+dfsg-1ubuntu1.2",
        "0.99.2+dfsg-0ubuntu0.16.04.1",
        "0.99.2+dfsg-0ubuntu0.16.04.2",
        "0.99.2+dfsg-0ubuntu0.16.04.3",
        "0.99.3+addedllvm-0ubuntu0.16.04.1",
        "0.99.4+addedllvm-0ubuntu0.16.04.1",
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        "0.102.3+dfsg-0ubuntu0.16.04.1",
        "0.102.4+dfsg-0ubuntu0.16.04.1",
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        "0.103.6+dfsg-0ubuntu0.16.04.1+esm1",
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        "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-base",
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          },
          {
            "binary_name": "clamav-daemon",
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          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
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          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@0.103.12+dfsg-0ubuntu0.18.04.1+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
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        "0.99.3~beta1+dfsg-2ubuntu2",
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        "0.99.3+addedllvm-0ubuntu2",
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        "0.100.1+dfsg-1ubuntu0.18.04.2",
        "0.100.1+dfsg-1ubuntu0.18.04.3",
        "0.100.2+dfsg-1ubuntu0.18.04.1",
        "0.100.3+dfsg-0ubuntu0.18.04.1",
        "0.101.4+dfsg-0ubuntu0.18.04.1",
        "0.102.1+dfsg-0ubuntu0.18.04.2",
        "0.102.2+dfsg-0ubuntu0.18.04.1",
        "0.102.3+dfsg-0ubuntu0.18.04.1",
        "0.102.4+dfsg-0ubuntu0.18.04.1",
        "0.103.2+dfsg-0ubuntu0.18.04.1",
        "0.103.2+dfsg-0ubuntu0.18.04.2",
        "0.103.2+dfsg-0ubuntu0.18.04.3",
        "0.103.5+dfsg-0ubuntu0.18.04.1",
        "0.103.6+dfsg-0ubuntu0.18.04.1",
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
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          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.4.3+dfsg-0ubuntu0.20.04.1+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
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            {
              "introduced": "0"
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          ],
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        "0.102.2+dfsg-1ubuntu1",
        "0.102.2+dfsg-2ubuntu1",
        "0.102.3+dfsg-0ubuntu0.20.04.1",
        "0.102.4+dfsg-0ubuntu0.20.04.1",
        "0.103.2+dfsg-0ubuntu0.20.04.1",
        "0.103.2+dfsg-0ubuntu0.20.04.2",
        "0.103.5+dfsg-1~20.04.1",
        "0.103.6+dfsg-0ubuntu0.20.04.1",
        "0.103.8+dfsg-0ubuntu0.20.04.1",
        "0.103.9+dfsg-0ubuntu0.20.04.1",
        "0.103.11+dfsg-0ubuntu0.20.04.1",
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        "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
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    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          },
          {
            "binary_name": "clamav-freshclam",
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          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          },
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            "binary_name": "clamav-testfiles",
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          },
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            "binary_name": "clamdscan",
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          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.3+dfsg-0ubuntu0.22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "clamav",
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      },
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              "introduced": "0"
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        "0.103.8+dfsg-0ubuntu0.22.04.1",
        "0.103.9+dfsg-0ubuntu0.22.04.1",
        "0.103.11+dfsg-0ubuntu0.22.04.1",
        "0.103.12+dfsg-0ubuntu0.22.04.1",
        "1.4.3+dfsg-0ubuntu0.22.04.1",
        "1.4.4+dfsg-0ubuntu0.22.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.3+dfsg-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.5.3+dfsg-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
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      "versions": [
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        "1.0.3+dfsg-2ubuntu1",
        "1.0.4+dfsg-0ubuntu1",
        "1.0.5+dfsg-1ubuntu1",
        "1.0.5+dfsg-1.1ubuntu2",
        "1.0.5+dfsg-1.1ubuntu3",
        "1.0.7+dfsg-0ubuntu0.24.04.1",
        "1.0.8+dfsg-0ubuntu0.24.04.1",
        "1.4.3+dfsg-0ubuntu0.24.04.1",
        "1.4.4+dfsg-0ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.4+dfsg-0ubuntu0.25.10.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.4.4+dfsg-0ubuntu0.25.10.1?arch=source\u0026distro=questing"
      },
      "ranges": [
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      ],
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        "1.4.2+dfsg-0ubuntu2",
        "1.4.2+dfsg-1ubuntu1",
        "1.4.3+dfsg-0ubuntu1",
        "1.4.3+dfsg-0ubuntu2",
        "1.4.4+dfsg-0ubuntu0.25.10.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.3+dfsg-0ubuntu0.26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.5.3+dfsg-0ubuntu0.26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.3+dfsg-0ubuntu0.26.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.3+dfsg-0ubuntu2",
        "1.4.3+dfsg-0ubuntu3",
        "1.4.3+dfsg-2ubuntu1",
        "1.4.3+dfsg-2ubuntu2",
        "1.4.3+dfsg-2ubuntu3",
        "1.4.4+dfsg-0ubuntu0.26.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PE files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PE content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.",
  "id": "UBUNTU-CVE-2026-20213",
  "modified": "2026-07-09T15:15:47Z",
  "published": "2026-07-02T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20213"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20213"
    },
    {
      "type": "REPORT",
      "url": "https://blog.clamav.net/2026/07/clamav-153-and-145-security-patch.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8517-1"
    }
  ],
  "related": [
    "USN-8517-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-20213"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.