ClamAV Files

ClamAV 1.5.2 is a patch release with the following fixes:

• CVE-2026-20031: Fixed an error handling bug in the HTML file parser that may crash the program and cause a denial-of-service (DoS) condition.

This issue was introduced in version 1.1.0. The fix is included in 1.5.2 and 1.4.4.

• Fixed a possible infinite loop when scanning some JPEG files by upgrading affected ClamAV dependency, a Rust image library.

Unfortunately, this change requires a newer Rust compiler for ClamAV. The minimum Rust version for ClamAV 1.4.3 was 1.85.1. The minimum Rust version for ClamAV 1.4.4 is now 1.87.0.

• Fixed a possible crash on Windows when scanning some files while using the LeaveTemporaryFiles and TemporaryDirectory features.

• The CVD verification process will now ignore certificate files in the CVD certs directory when the user lacks read permissions.

• Freshclam: Fixed CLD verification bug with PrivateMirror option.

• Upgraded the Rust bytes dependency to a newer version to resolve the RUSTSEC-2026-0007 advisory.

• Fixed a possible crash caused by invalid pointer alignment on some platforms. This fix is courtesy of Hsuan-Ming Chen at Synology PSIRT.