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Vulnerabilities

Vulnerability · CVE-2025-9900

A flaw was found in Libtiff.

Published Sep 23, 2025 · catalog updated Jun 29, 2026 · Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support

Check if you run it

No confirmed exploitation is on record for CVE-2025-9900. EPSS is 0.97%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.97%
Remediation
Vendor / distro source
Affected products
vendor Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support patch: 0:4.4.0-12.el9_4.4

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support patch: 0:4.4.0-12.el9_4.4patch: 0:4.4.0-12.el9_4.4

How to fix CVE-2025-9900

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-9900. EPSS is 0.97%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support is installed.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support patch: 0:4.4.0-12.el9_4.4 patch: 0:4.4.0-12.el9_4.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.97%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 23, 2025 · EUVD

    Detected

    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 denia

  2. Jun 29, 2026 · EUVD

    Updated

    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 denia

Sources

  • CVE.orgVulnerability recordCVE-2025-9900

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-9900

    30-day exploitation probability 0.97%

    first.org
  • EUVDVulnerability recordEUVD-2025-30917

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.