CVE-2026-47254

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, `Track::init_sample_timing_table()` in `libheif/sequences/track.cc` stores an out-of-bounds chunk index (`m_chunks.size()`) into `m_presentation_timeline` when the number of chunks defined in the `stco` box is less than the number of samples in `stsz`. A subsequent call to `heif_track_get_next_raw_sequence_sample()` reads `m_chunks[chunk_idx]` with that OOB index, causing a heap-buffer-overflow. Version 1.22.0 fixes 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-wqjg-4x9g-6cvg	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

27 Jul 2026, 15:16

Type	Values Removed	Values Added
References	~~() https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg -~~	() https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg - Exploit, Mitigation, Vendor Advisory
CPE		cpe:2.3:a:struktur:libheif::::::::
First Time		Struktur Struktur libheif

21 Jul 2026, 22:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-21 22:17

Updated : 2026-07-27 15:16

NVD link : CVE-2026-47254

Mitre link : CVE-2026-47254

CVE.ORG link : CVE-2026-47254

JSON object : View

Products Affected

struktur

libheif

CWE

CWE-125

Out-of-bounds Read

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