Write-what-where Condition Affecting libtiff package, versions [,4.7.1-rc1)
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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- published23 Sept 2025
- disclosed22 Sept 2025
- creditUnknown
Introduced: 22 Sep 2025
NewCVE-2025-9900 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade libtiff to version 4.7.1-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Write-what-where Condition in the TIFFReadRGBAImageOriented() function while processing paletted images with malformed metadata. TIFF file. An attacker can achieve arbitrary memory write by convincing a user to open a specially crafted TIFF file with a very large value for img.height (e.g., 0xFFFF) and a valid rheight (e.g.,256).