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CVE-2026-32740

8.8 HIGH

libheif is a HEIF and AVIF file format decoder and encoder

Published: 2026-05-19 · Last updated: 2026-05-21

Severity and scoring

CVSS
8.8 HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-787

Affected products

VendorProduct
strukturlibheif

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.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-41071 — libheif is a HEIF and AVIF file format decoder and encoder (8.1 HIGH)
  • CVE-2026-41069 — libheif is a HEIF and AVIF file format decoder and encoder (6.5 MEDIUM)
  • CVE-2026-32739 — libheif is a HEIF and AVIF file format decoder and encoder (6.5 MEDIUM)
  • CVE-2026-32738 — libheif is a HEIF and AVIF file format decoder and encoder (6.5 MEDIUM)

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