NULL pointer dereference in libheif - CVE-2026-47709
Published: May 20, 2026
Vulnerability identifier: #VU131958
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-47709
CWE-ID: CWE-476
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.
The vulnerability exists due to a null pointer dereference in heif_image_handle_get_image_tiling() when processing a malformed uncompressed HEIF image item missing the ispe property. A remote attacker can supply a specially crafted HEIF file to cause a denial of service.
The issue is reachable through the public C API and may trigger an assertion in debug builds.
How to mitigate CVE-2026-47709
Install security update from vendor's website.