CVE-2026-32740 - libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing

CVE-2026-32740 - libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing

https://cvefeed.io/rssfeed/latest.atom / Tue, 05/19/2026 - 23:24
CVE ID :CVE-2026-32740
Published : May 19, 2026, 8:16 p.m. | 42 minutes ago
Description :libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1×4 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0.
Severity: 8.8 | HIGH
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