ClamAV 1.5.1 is a patch release with the following fixes:

• Fixed a significant performance issue when scanning some PE files.

• Fixed an issue recording file entries from a ZIP archive central directory which resulted in "Heuristics.Limits.Exceeded.MaxFiles" alerts when using the ClamScan --alert-exceeds-max command line option or ClamD AlertExceedsMax config file option.

• Improved performance when scanning TNEF email attachments.

• Fixed an issue with recording metadata for OOXML office documents.

• Fixed an issue with signature matches for VBA in OLE2 office documents.

• Loosened overly restrictive rules for embedded file identification and increased the limit for finding PE files embedded in other PE files.

• Fixed an issue with extracting some RAR archives embedded in other files.

• Fixed an issue with calculating fuzzy hashes affecting some images by updating the version for several Rust library dependencies.

  • This release does not require a newer version of the Rust compiler toolchain than what was required for ClamAV 1.5.0.

GitHub pull request