Affected: Cisco Secure Endpoint

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.

Affected: Ubuntu:22.04:LTS: clamav, Ubuntu:24.04:LTS: clamav, Ubuntu:26.04:LTS: clamav

It was discovered that ClamAV incorrectly handled certain PE files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20213, CVE-2026-20214, CVE-2026-20217)

It was discovered that ClamAV incorrectly handled certain 7z archive files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20215)

It was discovered that ClamAV incorrectly handled extraction limits for certain InstallShield archives. A remote attacker could possibly use this issue to cause ClamAV to use excessive resources, leading to a denial of service. (CVE-2026-20216)

It was discovered that ClamAV incorrectly handled certain ALZ archive files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20243)

It was discovered that ClamAV incorrectly handled certain DMG files. A remote attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service. (CVE-2026-20244)