Uncaught Exception in libheif - #VU147365
Published: September 8, 2026
Vulnerability identifier: #VU147365
CSH Severity: Medium
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-248
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an uncaught exception in heif_track_get_next_raw_sequence_sample() when processing a crafted HEIF sequence file containing an attacker-sized sample under memory pressure. A remote attacker can supply a crafted file to cause a denial of service.
User interaction is required to process a crafted file, and exploitation requires an allocation failure.
Affected software
libheif
Remediation
Install security update from vendor's website.
libheif - update to 1.23.4