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CVE-2026-32739

libheif is Vulnerable to Infinite Loop DoS via stts Sample Duration Lookup

Published: May 19, 2026Updated: May 20, 2026 Sources: CVE List NVDCWE-835
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 77.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-835

Affected Products

libheifstrukturag
Library
OSS Libraries / generic-library
libheifstruktur
LibraryLibrary
OSS Libraries / generic-library
strukturagoss-projectOSS Librariesaka libheif, libde265, strukturag/libde265
struktuross-projectOSS Librariesaka libde265, libheif, libde265 libheif

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c
github.com
https://github.com/strukturag/libheif/releases/tag/v1.22.0
github.com

Timeline

Published
May 19, 2026
Last Updated
May 20, 2026

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