CVE-2026-47714

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in `libheif/region.cc` contains an integer overflow. Both `width` and `height` are `unsigned int` (32-bit) values parsed from the HEIF file. Their product can exceed `UINT32_MAX`, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a `width x height` bitmap. Version 1.22.0 patches the issue.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/strukturag/libheif/security/advisories/GHSA-h4wm-6wwf-qvhx	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*

History

30 Jul 2026, 15:07

Type	Values Removed	Values Added
First Time		Struktur Struktur libheif
References	~~() https://github.com/strukturag/libheif/security/advisories/GHSA-h4wm-6wwf-qvhx -~~	() https://github.com/strukturag/libheif/security/advisories/GHSA-h4wm-6wwf-qvhx - Mitigation, Vendor Advisory
CPE		cpe:2.3:a:struktur:libheif::::::::

21 Jul 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-21 21:16

Updated : 2026-07-30 15:07

NVD link : CVE-2026-47714

Mitre link : CVE-2026-47714

CVE.ORG link : CVE-2026-47714

JSON object : View

Products Affected

struktur

libheif

CWE

CWE-190

Integer Overflow or Wraparound

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