Integer overflow in libheif - CVE-2026-47714
Published: May 20, 2026
Vulnerability identifier: #VU131972
CSH Severity: Medium
CVSS v4: 7 [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]
CVE-ID: CVE-2026-47714
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to integer overflow or wraparound in the inline mask parsing code in libheif/region.cc when parsing a crafted HEIF file. A remote attacker can trick the victim into opening a crafted file to cause a denial of service and disclose sensitive information.
The issue is reachable when applications raise the max_image_size_pixels limit or disable it via LIBHEIF_SECURITY_LIMITS=off.
Affected software
libheif
Debian Linux
Ubuntu
libheif (Ubuntu package)
libheif (Debian package)
Debian Linux
Ubuntu
libheif (Ubuntu package)
libheif (Debian package)
How to mitigate CVE-2026-47714
Install security update from vendor's website.
libheif - update to 1.22.0
libheif (Ubuntu package) - addressed in versions 1.17.6-1ubuntu4.6, 1.20.2-1ubuntu0.6, 1.21.2-3ubuntu0.3
libheif (Debian package) - update to 1.19.8-1+deb13u1
libheif (Ubuntu package) - addressed in versions 1.17.6-1ubuntu4.6, 1.20.2-1ubuntu0.6, 1.21.2-3ubuntu0.3
libheif (Debian package) - update to 1.19.8-1+deb13u1