CVE catalog

CVE-2026-20346

A vulnerability in the PDF file format parser of…

A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF file 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: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Aug 7, 2026, 5:17:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.54% · Oct 27, 2026

Projects and upstream resources

[clamav][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "clamav",
      "status": "fixed",
      "release": "sid",
      "version": "1.4.6+dfsg-1"
    },
    {
      "name": "clamav",
      "status": "fixed",
      "release": "forky",
      "version": "1.4.6+dfsg-1"
    },
    {
      "name": "clamav",
      "status": "vulnerable",
      "release": "trixie",
      "version": "1.4.3+dfsg-1"
    },
    {
      "name": "clamav",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.4.3+dfsg-1~deb12u2"
    },
    {
      "name": "clamav",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "1.4.6+dfsg-0+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1143939,
      "name": "clamav",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.4.6+dfsg-1"
    },
    {
      "bug": 1143939,
      "name": "clamav",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1.4.6+dfsg-1"
    },
    {
      "bug": 1143939,
      "name": "clamav",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1143939,
      "name": "clamav",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1.4.6+dfsg-0+deb12u1"
    }
  ],
  "distribution_packages": [
    {
      "name": "clamav",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-base",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-daemon",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-doc",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-docs",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-freshclam",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-milter",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav-testfiles",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamdscan",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "libclamav-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "libclamav12",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1"
    },
    {
      "name": "clamav",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "0.101.4+dfsg-1ubuntu1",
        "0.102.1+dfsg-1ubuntu1",
        "0.102.1+dfsg-2ubuntu1",
        "0.102.1+dfsg-2ubuntu2",
        "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",
        "0.103.12+dfsg-0ubuntu0.20.04.1",
        "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-20346"
    },
    {
      "name": "clamav",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+dfsg-0ubuntu0.22.04.1"
            }
          ]
        }
      ],
      "release": "22.04",
      "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"
      ],
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.22.04.1",
      "provider_record_id": "UBUNTU-CVE-2026-20346"
    },
    {
      "name": "clamav",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+dfsg-0ubuntu0.24.04.1"
            }
          ]
        }
      ],
      "release": "24.04",
      "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"
      ],
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.24.04.1",
      "provider_record_id": "UBUNTU-CVE-2026-20346"
    },
    {
      "name": "clamav",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.4+dfsg-0ubuntu0.26.04.1"
            }
          ]
        }
      ],
      "release": "26.04",
      "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"
      ],
      "ecosystem": "deb",
      "fixed_version": "1.5.4+dfsg-0ubuntu0.26.04.1",
      "provider_record_id": "UBUNTU-CVE-2026-20346"
    }
  ]
}

[Debian bug #1143939]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[clamav]Unknown
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-base]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-daemon]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-doc]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-docs]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-freshclam]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-milter]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamav-testfiles]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · all · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[clamdscan]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[libclamav12]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
[libclamav-dev]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1~deb12u2 · amd64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12
- 1.4.3+dfsg-1~deb12u2 · arm64 · bookworm
  Affected · Fixed: 1.4.6+dfsg-0+deb12u1
  nvd · clamav · debian · bookworm; nvd · clamav · debian · 12

[Debian 13 (Trixie)]

[clamav]Unknown
Details (2)
- 1.4.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-base]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-daemon]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-doc]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-docs]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-freshclam]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-milter]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · clamav · debian · 13
[clamav-testfiles]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · all · trixie
  Affected
  nvd · clamav · debian · 13
[clamdscan]Unknown
Source package: [clamav]
Details (2)
- 1.4.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · clamav · debian · 13
- 1.4.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · clamav · debian · 13

Next results

Observed: Oct 25, 2026, 2:36:18 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]