Access of Uninitialized Pointer in libheif - #VU158742
Published: November 3, 2026
Vulnerability identifier: #VU158742
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-824
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing the heif-info or heif-dec command-line tool.
The vulnerability exists due to access of an uninitialized pointer in the URI track-listing code of heif-info and heif-dec when processing a HEIF sequence containing a 'urim' sample entry without a 'uri ' child box. A remote attacker can trick a victim into processing a crafted file with heif-info or heif-dec -S to trigger printing and releasing an uninitialized URI pointer, potentially causing a use-after-free and double free, and crash the tool.
The libheif library itself is not affected.
Affected software
libheif
Remediation
Install security update from vendor's website.
libheif - update to 1.23.7