Out-of-bounds write in oiio - CVE-2026-63419
Published: August 2, 2026
Vulnerability identifier: #VU140743
CSH Severity: High
CVSS v4 BT: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2026-63419
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in IffInput::read_native_tile() when parsing a crafted Maya IFF file and copying tile data into a caller-provided buffer sized from ImageSpec::tile_bytes(true). A remote attacker can trick the victim into opening a crafted file to execute arbitrary code.
User interaction is required to open a crafted file. The issue is reachable for ZBUFFER-only tiled images because the internal pixel size used for copying is larger than the public tile size exposed to callers, and a failed partial read can leave a buffer state that is reused by a later tile read.
Affected software
oiio
How to mitigate CVE-2026-63419
Install security update from vendor's website.
oiio - update to 3.1.16.0