Out-of-bounds write in oiio - CVE-2026-63638
Published: August 2, 2026
Vulnerability identifier: #VU140740
CSH Severity: High
CVSS v4 BT: 4.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2026-63638
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a heap out-of-bounds write.
The vulnerability exists due to out-of-bounds write in the Cineon reader when processing a crafted Cineon image with an invalid component bit depth. A remote attacker can supply a specially crafted Cineon file to cause a heap out-of-bounds write.
User interaction is required to open or process a crafted Cineon file.
Affected software
oiio
How to mitigate CVE-2026-63638
Install security update from vendor's website.
oiio - update to 3.1.16.0