Out-of-bounds read in libheif - #VU145070
Published: August 25, 2026
Vulnerability identifier: #VU145070
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
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 out-of-bounds read in the YCbCr to RGB color conversion code in libheif when parsing a crafted HEIF file containing an uncompressed YCbCr planar image with an odd component bit depth and decoding it to RGB. 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 the crafted file, or the vulnerable application must process it automatically.
Affected software
libheif
Remediation
Install security update from vendor's website.
libheif - update to 1.18.2