5.6.0

Status: Released July 2026

The 5.6.0 release is a minor maintenance release.

• Codec library updates:
  • Bug fix: Avoid undefined behavior caused by passing floating point values outside of the [0.0, 1.0] range as input data for a UNORM color
    channel.
  • Bug fix: Avoid undefined behavior caused by unaligned access in SSE, AVX2, and NEON SIMD library implementations.
• Command line tool updates:
  • Bug fix: Fixed incorrect plane stride when writing an uncompressed 3D LDR image to a DDS container.
  • Bug fix: Fixed potential integer overflow when storing very large uncompressed images to a .dds or .ktx output image format.
  • Bug fix: Fixed missing initialization of the reserved2 field in the DDS file header when writing uncompressed .dds output images.
  • Bug fix: Fixed typos and grammar issues in the command line -help text.

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