AIKIDO-2026-557846
strukturag.libheif is vulnerable to Heap-based Buffer Overflow
75
High Risk
This Affects:
strukturag.libheifTL;DR
The SVT-AV1 encoder plugin in libheif allocates a dummy chroma plane sized for one byte per sample but writes it through the 16-bit path when encoding high-bit-depth images that carry an alpha channel. Encoding such an image writes twice the allocated size, overflowing the heap buffer with a fixed byte pattern. This produces file-influenced heap corruption in builds that use the SVT-AV1 encoder. The fix multiplies the allocation by the per sample byte count.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your build uses the SVT-AV1 encoder plugin to encode high-bit-depth images that include an alpha channel.
Background info
strukturag.libheif is vulnerable to Heap-based Buffer Overflow in versions 1.19.6 - 1.23.2.
How to fix this
Upgrade the strukturag.libheif library to the patch version.
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