# CVE-2025-9900: Libtiff: libtiff write-what-where

Status: published. Published: 2025-09-23. Updated: 2026-11-04.

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.

## Remediation

- workaround: 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. (source: CNA: redhat)

## Affected products and versions

-  /  (libtiff): ≥ 0; < 4.7.1 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (libtiff): ≥ 0:4.6.0-6.el10_0.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (libtiff): ≥ 0:4.6.0-6.el10_1.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support (compat-libtiff3): ≥ 0:3.9.4-12.el7_9.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support (libtiff): ≥ 0:4.0.3-35.el7_9.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (compat-libtiff3): ≥ 0:3.9.4-14.el8_10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (libtiff): ≥ 0:4.0.9-35.el8_10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (mingw-libtiff): ≥ 0:4.0.9-3.el8_10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (compat-libtiff3): ≥ 0:3.9.4-13.el8_2.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (libtiff): ≥ 0:4.0.9-17.el8_2.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (spice-client-win): ≥ 0:8.10-3.el8_2.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (compat-libtiff3): ≥ 0:3.9.4-13.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (libtiff): ≥ 0:4.0.9-18.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (spice-client-win): ≥ 0:8.10-3.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (compat-libtiff3): ≥ 0:3.9.4-13.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (libtiff): ≥ 0:4.0.9-18.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (spice-client-win): ≥ 0:8.10-3.el8_4.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (compat-libtiff3): ≥ 0:3.9.4-13.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (libtiff): ≥ 0:4.0.9-21.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (spice-client-win): ≥ 0:8.10-3.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (compat-libtiff3): ≥ 0:3.9.4-13.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (libtiff): ≥ 0:4.0.9-21.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (spice-client-win): ≥ 0:8.10-3.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (compat-libtiff3): ≥ 0:3.9.4-13.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (libtiff): ≥ 0:4.0.9-21.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (spice-client-win): ≥ 0:8.10-3.el8_6.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service (compat-libtiff3): ≥ 0:3.9.4-13.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service (libtiff): ≥ 0:4.0.9-29.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service (spice-client-win): ≥ 0:8.10-3.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (compat-libtiff3): ≥ 0:3.9.4-13.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (libtiff): ≥ 0:4.0.9-29.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (spice-client-win): ≥ 0:8.10-3.el8_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libtiff): ≥ 0:4.4.0-13.el9_6.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libtiff): ≥ 0:4.4.0-15.el9_7.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions (libtiff): ≥ 0:4.2.0-3.el9_0.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (libtiff): ≥ 0:4.4.0-8.el9_2.4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support (libtiff): ≥ 0:4.4.0-12.el9_4.4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat AI Inference Server 3.2 (rhaiis/vllm-cuda-rhel9): ≥ 3.2.2-1765379088; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat AI Inference Server 3.2 (rhaiis/vllm-rocm-rhel9): ≥ 3.2.2-1765379049; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat AI Inference Server 3.2 (rhaiis/model-opt-cuda-rhel9): ≥ 3.2.2-1764871796; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat AI Inference Server 3.2 (rhaiis/vllm-cuda-rhel9): ≥ 1772160593; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat AI Inference Server 3.2 (rhaiis/vllm-rocm-rhel9): ≥ 1772160625; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Discovery 2 (discovery/discovery-ui-rhel9): ≥ 2.4.0-1763656152; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (libtiff-main): ≥ 4.7.1-2.1.hum1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (libtiff): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: CNA: redhat

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 1.00% as of 2026-11-03; percentile 63.02%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-123

## Exploit evidence

- exploit: https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file (ADP: CISA-ADP)

## References

- https://access.redhat.com/errata/RHSA-2025:17651 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:17675 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:17710 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:17738 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:17739 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:17740 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:19113 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:19156 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:19276 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:19906 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:19947 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:20956 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:20998 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21060 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21061 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21062 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21407 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21506 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21507 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21508 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:21994 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:23078 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:23079 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:23080 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:0001 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:0076 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:0077 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:0078 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:3461 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:3462 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:7504 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2025-9900 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2392784 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file (CNA: redhat)

- https://gitlab.com/libtiff/libtiff/-/issues/704 (CNA: redhat)

- https://gitlab.com/libtiff/libtiff/-/merge_requests/732 (CNA: redhat)

- https://libtiff.gitlab.io/libtiff/releases/v4.7.1.html (CNA: redhat)

- https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file (ADP: CISA-ADP; exploit)

- https://lists.debian.org/debian-lts-announce/2025/09/msg00031.html (ADP: CVE)

- http://www.openwall.com/lists/oss-security/2025/09/26/3 (ADP: CVE)

- https://access.redhat.com/errata/RHSA-2025:17651 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:17675 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:17710 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:17738 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:17739 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:17740 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:19113 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:19156 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:19276 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:19906 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:19947 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:20956 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:20998 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21060 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21061 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21062 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21407 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21506 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21507 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21508 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:21994 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:23078 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:23079 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:23080 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:0001 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:0076 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:0077 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:0078 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:3461 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:3462 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2026:7504 (secalert@redhat.com)

- https://access.redhat.com/security/cve/CVE-2025-9900 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2392784 (secalert@redhat.com)

- https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file (secalert@redhat.com)

- https://gitlab.com/libtiff/libtiff/-/issues/704 (secalert@redhat.com)

- https://gitlab.com/libtiff/libtiff/-/merge_requests/732 (secalert@redhat.com)

- https://libtiff.gitlab.io/libtiff/releases/v4.7.1.html (secalert@redhat.com)

- http://www.openwall.com/lists/oss-security/2025/09/26/3 (af854a3a-2127-422b-91ae-364da2661108)

- https://lists.debian.org/debian-lts-announce/2025/09/msg00031.html (af854a3a-2127-422b-91ae-364da2661108)

- https://github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where?tab=readme-ov-file (134c704f-9b21-4f2e-91b3-4a467353bcc0)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2025-9900; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9900; retrieved 2026-11-04; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-9900; retrieved 2026-11-03; source updated Not reported

Revision: fc47ec4c0b82f37fa0e0b36b2e84443de3e79212bf1a549cb73e726151301f89

Canonical: https://y2.dev/cve/CVE-2025-9900

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