Heap-based buffer overflow in oiio - CVE-2026-67549
Published: August 2, 2026
Vulnerability identifier: #VU140737
CSH Severity: Medium
CVSS v4 BT: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2026-67549
CWE-ID: CWE-122
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 corrupt heap memory.
The vulnerability exists due to a heap-based buffer overflow in TIFFInput::bit_convert() when processing a crafted 1-bit CMYK TIFF file during hash computation. A remote attacker can supply a specially crafted TIFF file to cause a denial of service and corrupt heap memory.
User interaction is required to process the crafted TIFF file, such as via iinfo -hash or oiiotool --hash.
Affected software
oiio
How to mitigate CVE-2026-67549
Install security update from vendor's website.
oiio - update to 3.1.16.0