Out-of-bounds read in libheif - #VU145256
Published: August 25, 2026
Vulnerability identifier: #VU145256
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information and cause a denial of service.
The vulnerability exists due to out-of-bounds read in heif_region_get_inline_mask_image() and the inline-mask region writer API when processing caller-supplied inline mask geometry and buffer lengths. A remote attacker can supply an undersized mask buffer with crafted width and height values to disclose sensitive information and cause a denial of service.
The issue is confined to the public writer API and is not reachable through the file-parsing path.
Affected software
libheif
Remediation
Install security update from vendor's website.
libheif - update to 1.23.2