CVE-2026-41069
libheif allows Out-of-bounds vector access leading to invalid dereference (DoS)
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 CWE-476 |
| Vendor | strukturag |
| Product | libheif |
| Published | May 22, 2026 |
| Last Updated | May 26, 2026 |
Stay Ahead of the Next One
Get instant alerts for strukturag libheif
Be the first to know when new medium vulnerabilities affecting strukturag libheif are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
strukturag / libheif
< 1.22.0