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Fencer Intel
high 8.8

CVE-2025-9900 json

Libtiff: libtiff write-what-where

published last yr. modified 5d ago also EUVD-2025-30917

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • libtiff.gitlab.io libtiff 4.7.1
  • Red Hat Red Hat Enterprise Linux 10 0:4.6.0-6.el10_0.1, 0:4.6.0-6.el10_1.1
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.9.4-12.el7_9.1, 0:4.0.3-35.el7_9.1
  • Red Hat Red Hat Enterprise Linux 8 0:3.9.4-14.el8_10, 0:4.0.9-3.el8_10, 0:4.0.9-35.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:3.9.4-13.el8_2.1, 0:4.0.9-17.el8_2.1, 0:8.10-3.el8_2.1
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:3.9.4-13.el8_4.1, 0:4.0.9-18.el8_4.1, 0:8.10-3.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:3.9.4-13.el8_4.1, 0:4.0.9-18.el8_4.1, 0:8.10-3.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:3.9.4-13.el8_6.1, 0:4.0.9-21.el8_6.1, 0:8.10-3.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:3.9.4-13.el8_6.1, 0:4.0.9-21.el8_6.1, 0:8.10-3.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:3.9.4-13.el8_6.1, 0:4.0.9-21.el8_6.1, 0:8.10-3.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:3.9.4-13.el8_8.1, 0:4.0.9-29.el8_8.1, 0:8.10-3.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:3.9.4-13.el8_8.1, 0:4.0.9-29.el8_8.1, 0:8.10-3.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 0:4.4.0-13.el9_6.2, 0:4.4.0-15.el9_7.2
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:4.2.0-3.el9_0.2
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.4.0-8.el9_2.4
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:4.4.0-12.el9_4.4
  • Red Hat Red Hat AI Inference Server 3.2 3.2.2-1764871796, 3.2.2-1765379049, 3.2.2-1765379088, 1772160593, 1772160625
  • Red Hat Red Hat Discovery 2 2.4.0-1763656152
  • Red Hat Red Hat Hardened Images 4.7.1-2.1.hum1
  • tiff Debian 12 4.5.0-6+deb12u3
  • tiff Debian 13 4.7.0-3+deb13u1
  • tiff Debian 14 4.7.1-1

debian advisories DEBIAN-CVE-2025-9900

  • tiff Ubuntu 22.04 LTS 4.3.0-6ubuntu0.12
  • tiff Ubuntu 24.04 LTS 4.5.1+git230720-4ubuntu2.4
  • tiff Ubuntu 26.04 LTS, Ubuntu 25.10 4.7.0-3ubuntu3
  • gdal Ubuntu Pro 14.04 LTS 1.10.1+dfsg-5ubuntu1+esm2
  • gdal Ubuntu Pro 16.04 LTS 1.11.3+dfsg-3ubuntu0.1~esm1
  • tiff Ubuntu Pro 14.04 LTS 4.0.3-7ubuntu0.11+esm16
  • tiff Ubuntu Pro 16.04 LTS 4.0.6-1ubuntu0.8+esm19
  • tiff Ubuntu Pro 18.04 LTS 4.0.9-5ubuntu0.10+esm9

ubuntu advisories UBUNTU-CVE-2025-9900

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libtiff hummingbird 1 4.7.1-2.1.hum1
  • libtiff-tools hummingbird 1 4.7.1-2.1.hum1
  • libtiff RHEL 10.1 4.6.0-6.el10_1.1
  • libtiff-tools RHEL 10.1 4.6.0-6.el10_1.1
  • libtiff RHEL 9 4.4.0-15.el9_7.2
  • libtiff-tools RHEL 9 4.4.0-15.el9_7.2
  • mingw-libtiff RHEL 8 4.0.9-3.el8_10
  • mingw32-libtiff RHEL 8 4.0.9-3.el8_10

red hat advisories RHSA-2026:7504RHSA-2026:0077RHSA-2026:0078RHSA-2026:0076RHSA-2026:0001RHSA-2025:21508

  • tiff SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4.7.1-160000.1.1
  • tiff Linux Micro 6.0 4.7.1-1.1
  • tiff Linux Micro 6.1 4.7.1-slfo.1.1_1.1
  • tiff SLE Module for Package Hub 15 SP7, SLE Module for Package Hub 15 SP6, SLE Module for Basesystem 15 SP7 +2 more 4.7.1-150600.3.23.1
  • tiff SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +17 more 4.0.9-150000.45.60.1
  • tiff SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 4.0.9-44.97.1

suse advisories SUSE-SU-2025:21009-1SUSE-SU-2025:21032-1SUSE-SU-2025:21037-1SUSE-SU-2025:20971-1SUSE-SU-2025:3961-1SUSE-SU-2025:3957-1

  • tiff openSUSE Leap 16.0 4.7.1-160000.1.1
  • tiff-man openSUSE Leap 16.0 4.7.1-160000.1.1
  • tiff openSUSE Tumbleweed 4.7.1-2.1

opensuse advisories openSUSE-SU-2025:20049-1openSUSE-SU-2025:15635-1

  • libtiff AlmaLinux 9 4.4.0-15.el9_7.2
  • libtiff-tools AlmaLinux 9 4.4.0-15.el9_7.2
  • libtiff AlmaLinux 10 4.6.0-6.el10_1.1
  • libtiff-tools AlmaLinux 10 4.6.0-6.el10_1.1
  • mingw32-libtiff AlmaLinux 8 4.0.9-3.el8_10
  • mingw64-libtiff AlmaLinux 8 4.0.9-3.el8_10
  • libtiff AlmaLinux 8 4.0.9-35.el8_10
  • libtiff-tools AlmaLinux 8 4.0.9-35.el8_10

almalinux advisories ALSA-2025:20956ALSA-2025:20998ALSA-2025:19906ALSA-2025:19276ALSA-2025:19156ALSA-2025:19113

  • libtiff Rocky Linux 9 4.4.0-15.el9_7.2.0.1
  • mingw-libtiff Rocky Linux 8 4.0.9-3.el8_10
  • libtiff Rocky Linux 9 4.4.0-13.el9_6.2
  • libtiff Rocky Linux 10 4.6.0-6.el10_0.1
  • libtiff Rocky Linux 8 4.0.9-35.el8_10
  • compat-libtiff3 Rocky Linux 8 3.9.4-14.el8_10

rocky linux advisories RLSA-2025:20956RLSA-2025:19906RLSA-2025:19113RLSA-2025:19156RLSA-2025:19276RLSA-2025:17675

  • libtiff CBL-Mariner 2.0 4.6.0-9
  • libtiff Azure Linux 3.0 4.6.0-10

azure linux advisories AZL-67794AZL-67803

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-9900 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-9900 updated cvss 8.8

libtiff: Libtiff Write-What-Where

  • Red Hat Enterprise Linux 6 libtiff
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat AI Inference Server 3.2 rhaiis 1772160593, rhaiis 1772160625, rhaiis 3.2.2-1764871796, rhaiis 3.2.2-1765379049, rhaiis 3.2.2-1765379088
    fixed: vendor fix RHSA-2025:23080
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libtiff-tools 4.4.0-12.el9_4.4
    fixed: vendor fix RHSA-2025:21507
  • Red Hat Discovery 2 discovery 2.4.0-1763656152
    fixed: vendor fix RHSA-2025:21994
  • Red Hat Enterprise Linux AppStream (v. 8) libtiff 4.0.9-35.el8_10, compat-libtiff3 3.9.4-14.el8_10
    fixed: vendor fix RHSA-2025:17675
  • Red Hat Enterprise Linux AppStream (v. 9) libtiff 4.4.0-13.el9_6.2, libtiff 4.4.0-15.el9_7.2
    fixed: vendor fix RHSA-2025:19113
  • Red Hat Enterprise Linux AppStream (v. 10) libtiff 4.6.0-6.el10_0.1, libtiff 4.6.0-6.el10_1.1
    fixed: vendor fix RHSA-2025:19156
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libtiff 4.0.9-17.el8_2.1, spice-client-win 8.10-3.el8_2.1, compat-libtiff3 3.9.4-13.el8_2.1, spice-client-win-x64 8.10-3.el8_2.1, spice-client-win-x86 8.10-3.el8_2.1
    fixed: vendor fix RHSA-2025:17738
show 16 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libtiff 4.0.9-18.el8_4.1, spice-client-win 8.10-3.el8_4.1, compat-libtiff3 3.9.4-13.el8_4.1, spice-client-win-x64 8.10-3.el8_4.1, spice-client-win-x86 8.10-3.el8_4.1
    fixed: vendor fix RHSA-2025:17651
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libtiff 4.0.9-21.el8_6.1, spice-client-win 8.10-3.el8_6.1, compat-libtiff3 3.9.4-13.el8_6.1, spice-client-win-x64 8.10-3.el8_6.1, spice-client-win-x86 8.10-3.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) libtiff 4.0.9-21.el8_6.1, spice-client-win 8.10-3.el8_6.1, compat-libtiff3 3.9.4-13.el8_6.1, spice-client-win-x64 8.10-3.el8_6.1, spice-client-win-x86 8.10-3.el8_6.1
    fixed: vendor fix RHSA-2025:17739
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) libtiff 4.0.9-29.el8_8.1, spice-client-win 8.10-3.el8_8.1, compat-libtiff3 3.9.4-13.el8_8.1, spice-client-win-x64 8.10-3.el8_8.1, spice-client-win-x86 8.10-3.el8_8.1
    fixed: vendor fix RHSA-2025:17740
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libtiff 4.2.0-3.el9_0.2
    fixed: vendor fix RHSA-2025:21506
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libtiff 4.4.0-8.el9_2.4
    fixed: vendor fix RHSA-2025:21508
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libtiff 4.4.0-12.el9_4.4
    fixed: vendor fix RHSA-2025:21507
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) libtiff 4.0.9-18.el8_4.1, spice-client-win 8.10-3.el8_4.1, compat-libtiff3 3.9.4-13.el8_4.1, spice-client-win-x64 8.10-3.el8_4.1, spice-client-win-x86 8.10-3.el8_4.1
    fixed: vendor fix RHSA-2025:17651
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) libtiff 4.0.9-21.el8_6.1, spice-client-win 8.10-3.el8_6.1, compat-libtiff3 3.9.4-13.el8_6.1, spice-client-win-x64 8.10-3.el8_6.1, spice-client-win-x86 8.10-3.el8_6.1
    fixed: vendor fix RHSA-2025:17739
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) libtiff 4.0.9-29.el8_8.1, spice-client-win 8.10-3.el8_8.1, compat-libtiff3 3.9.4-13.el8_8.1, spice-client-win-x64 8.10-3.el8_8.1, spice-client-win-x86 8.10-3.el8_8.1
    fixed: vendor fix RHSA-2025:17740
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libtiff-tools 4.4.0-13.el9_6.2, libtiff-tools 4.4.0-15.el9_7.2
    fixed: vendor fix RHSA-2025:19113
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libtiff-tools 4.6.0-6.el10_0.1, libtiff-tools 4.6.0-6.el10_1.1
    fixed: vendor fix RHSA-2025:19156
  • Red Hat Enterprise Linux CRB (v. 8) mingw-libtiff 4.0.9-3.el8_10, libtiff-tools 4.0.9-35.el8_10, mingw32-libtiff 4.0.9-3.el8_10, mingw64-libtiff 4.0.9-3.el8_10
    fixed: vendor fix RHSA-2025:19276
  • Red Hat Enterprise Linux Server (v. 7 ELS) libtiff 4.0.3-35.el7_9.1, compat-libtiff3 3.9.4-12.el7_9.1
    fixed: vendor fix RHSA-2025:17710
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS) libtiff-tools 4.0.3-35.el7_9.1
    fixed: vendor fix RHSA-2025:21407
  • Red Hat Hardened Images libtiff 4.7.1-2.1.hum1, libtiff-tools 4.7.1-2.1.hum1
    fixed: vendor fix RHSA-2026:7504
  • Red Hat Discovery 2 discovery 2.4.0-1763596485 Red Hat Enterprise Linux AppStream AUS (v. 8.2) compat-libtiff3 3.9.4-13.el8_2.1 Red Hat Enterprise Linux AppStream AUS (v.8.4) compat-libtiff3 3.9.4-13.el8_4.1 Red Hat Enterprise Linux AppStream AUS (v.8.6) compat-libtiff3 3.9.4-13.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) compat-libtiff3 3.9.4-13.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.8) compat-libtiff3 3.9.4-13.el8_8.1
    +5 more products
    Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) compat-libtiff3 3.9.4-13.el8_4.1 Red Hat Enterprise Linux AppStream TUS (v.8.6) compat-libtiff3 3.9.4-13.el8_6.1 Red Hat Enterprise Linux AppStream TUS (v.8.8) compat-libtiff3 3.9.4-13.el8_8.1 Red Hat Enterprise Linux Server (v. 7 ELS) compat-libtiff3 3.9.4-12.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7 ELS) libtiff-debuginfo 4.0.3-35.el7_9.1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
6mo ago

Exploit prediction

1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • libtiff.gitlab.io libtiff
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat AI Inference Server 3.2
  • Red Hat Red Hat Discovery 2
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-123 Write-what-where Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.