Write-what-where Condition Affecting libtiff package, versions <0:4.4.0-15.el9_7.2


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ALMALINUX9-LIBTIFF-13744147
  • published29 Oct 2025
  • disclosed11 Nov 2025

Introduced: 29 Oct 2025

CVE-2025-9900  (opens in a new tab)
CWE-123  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 libtiff to version 0:4.4.0-15.el9_7.2 or higher.
This issue was patched in ALSA-2025:20956.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libtiff package and not the libtiff package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A flaw was found in Libtiff. This vulnerability is a "write-what-where" condition, triggered when the library processes a specially crafted TIFF image file.

By providing an abnormally large image height value in the file's metadata, an attacker can trick the library into writing attacker-controlled color data to an arbitrary memory location. This memory corruption can be exploited to cause a denial of service (application crash) or to achieve arbitrary code execution with the permissions of the user.

References

CVSS Base Scores

version 3.1