SB20261109192 - Out-of-bounds write in Openimageio

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Main Vulnerability Database SB20261109192

SB20261109192 - Out-of-bounds write in Openimageio

Published: November 9, 2026

Security Bulletin ID SB20261109192
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-108386)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated attacker to crash applications that process attacker-supplied TIFF files through OpenImageIO's ImageCache or TextureSystem.

The vulnerability exists due to inconsistent TIFF reader state after a directory fails validation, causing ImageCache to allocate storage using dimensions that differ from those used for copying pixels. An unauthenticated attacker can supply a crafted multi-directory TIFF for a victim to process, triggering an oversized write of attacker-controlled pixel data into a smaller heap buffer.


Remediation

Install update from vendor's website.

References