Out-of-bounds read in libheif - CVE-2026-47251
Published: May 20, 2026
Vulnerability identifier: #VU131962
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-47251
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: struktur AG
Affected software:
libheif
libheif
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to out-of-bounds read in vvdec_push_data2 in libheif's VVC decoder plugin when parsing a crafted HEIF file with a VVC track. A remote attacker can supply a specially crafted HEIF file to cause a denial of service and disclose sensitive information.
User interaction is required to open or decode the crafted file. Only builds with VVC support enabled are vulnerable.
How to mitigate CVE-2026-47251
Install security update from vendor's website.