USN-8788-1 (UBUNTU-CVE-2026-20337)

Vulnerability from osv_ubuntu – Published: 2026-09-21 12:05 – Updated: 2026-09-21 12:05 – Source website
VLAI
Summary
clamav vulnerabilities
Details

It was discovered that ClamAV incorrectly handled certain zip archive files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20337, CVE-2026-20338)

It was discovered that ClamAV incorrectly handled certain PESpin files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20339)

It was discovered that ClamAV incorrectly handled certain GPT files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20345)

It was discovered that ClamAV incorrectly handled certain PDF files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20346)

It was discovered that ClamAV incorrectly handled certain Mach-O files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20347)

It was discovered that ClamAV incorrectly handled certain XAR files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20348)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-20337",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20338",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20339",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20345",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20346",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20347",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20348",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.4+dfsg-0ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.5.4+dfsg-0ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+dfsg-0ubuntu0.22.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.103.3+dfsg-1",
        "0.103.4+dfsg-1",
        "0.103.4+dfsg-1build1",
        "0.103.5+dfsg-1",
        "0.103.6+dfsg-0ubuntu0.22.04.1",
        "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",
        "1.5.3+dfsg-0ubuntu0.22.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-20337",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20338",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20339",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20345",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20346",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20347",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20348",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.5.4+dfsg-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2+dfsg-1ubuntu1",
        "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",
        "1.5.3+dfsg-0ubuntu0.24.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-20337",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20338",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20339",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20345",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20346",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20347",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2026-20348",
              "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"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.5.4+dfsg-0ubuntu0.26.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.5.4+dfsg-0ubuntu0.26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+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",
        "1.5.3+dfsg-0ubuntu0.26.04.1",
        "1.5.3+dfsg-0ubuntu0.26.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that ClamAV incorrectly handled certain zip archive\nfiles. A remote attacker could possibly use this issue to cause ClamAV\nto crash, resulting in a denial of service. (CVE-2026-20337,\nCVE-2026-20338)\n\nIt was discovered that ClamAV incorrectly handled certain PESpin files.\nA remote attacker could possibly use this issue to cause ClamAV to\ncrash, resulting in a denial of service. (CVE-2026-20339)\n\nIt was discovered that ClamAV incorrectly handled certain GPT files. A\nremote attacker could possibly use this issue to cause ClamAV to crash,\nresulting in a denial of service. (CVE-2026-20345)\n\nIt was discovered that ClamAV incorrectly handled certain PDF files. A\nremote attacker could possibly use this issue to cause ClamAV to crash,\nresulting in a denial of service. (CVE-2026-20346)\n\nIt was discovered that ClamAV incorrectly handled certain Mach-O files.\nA remote attacker could possibly use this issue to cause ClamAV to\ncrash, resulting in a denial of service. (CVE-2026-20347)\n\nIt was discovered that ClamAV incorrectly handled certain XAR files. A\nremote attacker could possibly use this issue to cause ClamAV to crash,\nresulting in a denial of service. (CVE-2026-20348)",
  "id": "USN-8788-1",
  "modified": "2026-09-21T12:05:10Z",
  "published": "2026-09-21T12:05:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8788-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20337"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20338"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20339"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20345"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20346"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20347"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-20348"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "clamav vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-20337",
    "UBUNTU-CVE-2026-20338",
    "UBUNTU-CVE-2026-20339",
    "UBUNTU-CVE-2026-20345",
    "UBUNTU-CVE-2026-20346",
    "UBUNTU-CVE-2026-20347",
    "UBUNTU-CVE-2026-20348"
  ]
}



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