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CVE-2025-9900

UNKNOWN
Published 2025-09-23T16:26:22.846Z
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CVSS Score

V3.1
8.8
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

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.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (UNKNOWN) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

libtiff 4.7.0: Out-of-Bounds Write in TIFFReadRGBAImageOriented() (CVE-2025-9900)

Posted by Christian Hoffmann on Sep 26Hi, on 2025-09-23 CVE-2025-9900 was published for libtiff 4.7.0 and it seems to have gained some traction due to the potential risk of code execution via malicious TIFF files. I was wondering about the real world criti…

Seclists.org 2025-09-26 10:27

Affected Products

References

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Credits & Acknowledgments

Red Hat would like to thank Gareth C (AnchorSec Ltd.) for reporting this issue.

Timeline

Made public.

Reported to Red Hat.

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

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.

Affected Products (ENISA)

red hat
red hat enterprise linux 9.4 extended update support

ENISA Scoring

CVSS Score (3.1)

8.8
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score

0.030
probability

ENISA References

https://access.redhat.com/security/cve/CVE-2025-9900
https://bugzilla.redhat.com/show_bug.cgi?id=2392784
https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file
https://nvd.nist.gov/vuln/detail/CVE-2025-9900
https://access.redhat.com/errata/RHSA-2025:17651
https://access.redhat.com/errata/RHSA-2025:17675
https://access.redhat.com/errata/RHSA-2025:17710
https://access.redhat.com/errata/RHSA-2025:17738
https://access.redhat.com/errata/RHSA-2025:17739
https://access.redhat.com/errata/RHSA-2025:17740
https://access.redhat.com/errata/RHSA-2025:19113
https://access.redhat.com/errata/RHSA-2025:19156
https://access.redhat.com/errata/RHSA-2025:19276
https://lists.debian.org/debian-lts-announce/2025/09/msg00031.html
http://www.openwall.com/lists/oss-security/2025/09/26/3
https://access.redhat.com/errata/RHSA-2025:19906
https://gitlab.com/libtiff/libtiff/-/issues/704
https://gitlab.com/libtiff/libtiff/-/merge_requests/732
https://libtiff.gitlab.io/libtiff/releases/v4.7.1.html
https://access.redhat.com/errata/RHSA-2025:19947
https://access.redhat.com/errata/RHSA-2025:20956
https://access.redhat.com/errata/RHSA-2025:20998
https://access.redhat.com/errata/RHSA-2025:21061
https://access.redhat.com/errata/RHSA-2025:21062
https://access.redhat.com/errata/RHSA-2025:21060
https://access.redhat.com/errata/RHSA-2025:21407
https://access.redhat.com/errata/RHSA-2025:21506
https://access.redhat.com/errata/RHSA-2025:21507
https://access.redhat.com/errata/RHSA-2025:21508

Data provided by ENISA EU Vulnerability Database. Last updated: November 17, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-qc8j-wvjf-7jfj

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Advisory provided by GitHub Security Advisory Database. Published: September 23, 2025, Modified: November 17, 2025

References

Published: 2025-09-23T16:26:22.846Z
Last Modified: 2025-10-01T10:29:21.673Z
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