Out-of-bounds write in Openimageio - CVE-2026-43903
Published: May 5, 2026
Vulnerability identifier: #VU129721
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43903
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 denial of service.
The vulnerability exists due to out-of-bounds write in the SGI RLE decoder when parsing a crafted .sgi file. A remote attacker can supply a crafted .sgi file with an RLE count exceeding the scanline width to cause a denial of service.
User interaction is required to open the crafted file, and the issue affects release builds where the bounds checks compile to no-ops.
Affected software
Openimageio
Ubuntu
openimageio (Ubuntu package)
Ubuntu
openimageio (Ubuntu package)
How to mitigate CVE-2026-43903
Install security update from vendor's website.
Openimageio - addressed in versions 3.0.18.0, 3.1.13.0
openimageio (Ubuntu package) - addressed in versions 1.6.11~dfsg0-1ubuntu1+esm2, 1.7.17~dfsg0-1ubuntu2+esm1, 2.1.12.0~dfsg0-1ubuntu0.1~esm1, 2.4.17.0+dfsg-1.1ubuntu0.1~esm1, 2.5.19.1+dfsg-2ubuntu0.1~esm1
openimageio (Ubuntu package) - addressed in versions 1.6.11~dfsg0-1ubuntu1+esm2, 1.7.17~dfsg0-1ubuntu2+esm1, 2.1.12.0~dfsg0-1ubuntu0.1~esm1, 2.4.17.0+dfsg-1.1ubuntu0.1~esm1, 2.5.19.1+dfsg-2ubuntu0.1~esm1