Buffer overflow in Strukturag Libheif
CVE-2026-3949
A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Strukturag Libheif — versions 1.21.0, 1.21.1, 1.21.2
Weakness classification (CWE)
References
- VDB-350381 | strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds (technical-description, vdb-entry)
- VDB-350381 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #765979 | strukturag libheif 1.21.2 Out-of-Bounds Read (third-party-advisory)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (exploit)
- cna@vuldb.com (patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-3949?
- CVE-2026-3949 is a low-severity vulnerability in Strukturag Libheif, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-03-11.
- How severe is CVE-2026-3949?
- Low severity. CVSS v3 base score is 3.3 out of 10.