CVE-2026-41069

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entry_count == 0 (creating no chunks) while still passing validation because saio.entry_count == 0 matches, but with saiz.sample_count > 0 the SampleAuxInfoReader constructor still enters its loop. This leads to an out-of-bounds dereference on the empty chunks[0] in chunked mode.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/strukturag/libheif/releases/tag/v1.22.0	Product Release Notes
https://github.com/strukturag/libheif/security/advisories/GHSA-p82x-fpmv-576r	Exploit Vendor Advisory
https://github.com/strukturag/libheif/security/advisories/GHSA-p82x-fpmv-576r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-05-22 21:16

Updated : 2026-07-23 11:10

NVD link : CVE-2026-41069

Mitre link : CVE-2026-41069

CVE.ORG link : CVE-2026-41069

JSON object : View

Products Affected

struktur

libheif

CWE

CWE-125

Out-of-bounds Read

CWE-476

NULL Pointer Dereference

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