8.8
High
CVE-2026-32740 libheif is a HEIF and AVIF file format decoder and encoder
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| libheif 1.22 | earliest → < 1.22.0 | 1.22.0 |
| Red Hat Enterprise Linux 10 | Versions not published |
Other CVEs of libheif
The 34 CVEs of libheif →
CVE-2026-120208
libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in…
7.7
High
CVE-2026-84450
libheif is a HEIF and AVIF file format decoder and encoder
4.3
Medium
CVE-2026-84449
libheif is a HEIF and AVIF file format decoder and encoder
3.7
Low
CVE-2026-84451
libheif is a HEIF and AVIF file format decoder and encoder
6.5
Medium