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.

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History

Wed, 27 May 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*

Tue, 26 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 25 May 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Struktur
Struktur libheif
Vendors & Products Struktur
Struktur libheif

Fri, 22 May 2026 21:00:00 +0000

Type Values Removed Values Added
Description 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.
Title libheif allows Out-of-bounds vector access leading to invalid dereference (DoS)
Weaknesses CWE-125
CWE-476
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-26T12:16:13.289Z

Reserved: 2026-04-16T16:43:03.174Z

Link: CVE-2026-41069

cve-icon Vulnrichment

Updated: 2026-05-26T12:16:08.375Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-22T21:16:43.327

Modified: 2026-05-27T15:26:28.040

Link: CVE-2026-41069

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-25T11:30:23Z

Weaknesses