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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
strukturag libheif
< 1.22.0affected
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j ↗
- https://github.com/strukturag/libheif/releases/tag/v1.22.0 ↗
- https://access.redhat.com/security/cve/CVE-2026-32740 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2479969 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32740.json ↗