Libtiff: libtiff write-what-where

Summary

CVE	CVE-2025-9900
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2025-09-23 17:15:38 UTC
Updated	2026-06-29 21:16:42 UTC
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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.007390000 probability, percentile 0.500040000 (date 2026-07-01)

Problem Types: CWE-123 | CWE-123 Write-what-where Condition

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	8.8	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
3.1	CNA	CVSS	8.8	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Enterprise Linux 10	unaffected 0:4.6.0-6.el10_0.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 10	unaffected 0:4.6.0-6.el10_1.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:3.9.4-12.el7_9.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:4.0.3-35.el7_9.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	unaffected 0:3.9.4-14.el8_10 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	unaffected 0:4.0.9-35.el8_10 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	unaffected 0:4.0.9-3.el8_10 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected 0:3.9.4-13.el8_2.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected 0:4.0.9-17.el8_2.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected 0:8.10-3.el8_2.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:3.9.4-13.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:4.0.9-18.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:8.10-3.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:3.9.4-13.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:4.0.9-18.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:8.10-3.el8_4.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:3.9.4-13.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:4.0.9-21.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:8.10-3.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected 0:3.9.4-13.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected 0:4.0.9-21.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	unaffected 0:8.10-3.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions	unaffected 0:3.9.4-13.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions	unaffected 0:4.0.9-21.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions	unaffected 0:8.10-3.el8_6.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:3.9.4-13.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:4.0.9-29.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:8.10-3.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions	unaffected 0:3.9.4-13.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions	unaffected 0:4.0.9-29.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions	unaffected 0:8.10-3.el8_8.1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	unaffected 0:4.4.0-13.el9_6.2 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	unaffected 0:4.4.0-15.el9_7.2 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions	unaffected 0:4.2.0-3.el9_0.2 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions	unaffected 0:4.4.0-8.el9_2.4 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	unaffected 0:4.4.0-12.el9_4.4 * rpm	Not specified
CNA	Red Hat	Red Hat AI Inference Server 3.2	unaffected 3.2.2-1765379088 * rpm	Not specified
CNA	Red Hat	Red Hat AI Inference Server 3.2	unaffected 3.2.2-1765379049 * rpm	Not specified
CNA	Red Hat	Red Hat AI Inference Server 3.2	unaffected 3.2.2-1764871796 * rpm	Not specified
CNA	Red Hat	Red Hat AI Inference Server 3.2	unaffected 1772160593 * rpm	Not specified
CNA	Red Hat	Red Hat AI Inference Server 3.2	unaffected 1772160625 * rpm	Not specified
CNA	Red Hat	Red Hat Discovery 2	unaffected 2.4.0-1763656152 * rpm	Not specified
CNA	Red Hat	Red Hat Hardened Images	unaffected 4.7.1-2.1.hum1 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 6	Not specified	Not specified

References

Reference	Source	Link	Tags
access.redhat.com/errata/RHSA-2026:7504	[email protected]	access.redhat.com
libtiff.gitlab.io/libtiff/releases/v4.7.1.html	[email protected]	libtiff.gitlab.io
access.redhat.com/errata/RHSA-2026:0001	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:20998	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17675	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17739	[email protected]	access.redhat.com
gitlab.com/libtiff/libtiff/-/merge_requests/732	[email protected]	gitlab.com
access.redhat.com/errata/RHSA-2025:23080	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:0077	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:23079	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:20956	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17738	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:19947	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21994	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:23078	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21407	[email protected]	access.redhat.com
www.openwall.com/lists/oss-security/2025/09/26/3	af854a3a-2127-422b-91ae-364da2661108	www.openwall.com
access.redhat.com/errata/RHSA-2025:19276	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21060	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:3461	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17710	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:0078	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21061	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:17651	[email protected]	access.redhat.com
lists.debian.org/debian-lts-announce/2025/09/msg00031.html	af854a3a-2127-422b-91ae-364da2661108	lists.debian.org
access.redhat.com/errata/RHSA-2026:3462	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21508	[email protected]	access.redhat.com
bugzilla.redhat.com/show_bug.cgi	[email protected]	bugzilla.redhat.com
access.redhat.com/errata/RHSA-2025:21507	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21062	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:19113	[email protected]	access.redhat.com
github.com/SexyShoelessGodofWar/LibTiff-4.7.0-Write-What-Where	134c704f-9b21-4f2e-91b3-4a467353bcc0	github.com
gitlab.com/libtiff/libtiff/-/issues/704	[email protected]	gitlab.com
access.redhat.com/errata/RHSA-2025:17740	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:19156	[email protected]	access.redhat.com
access.redhat.com/security/cve/CVE-2025-9900	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:0076	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:19906	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2025:21506	[email protected]	access.redhat.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

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

Additional Advisory Data

Source	Time	Event
CNA	2025-09-03T02:48:12.111Z	Reported to Red Hat.
CNA	2025-09-22T14:29:35.767Z	Made public.

Workarounds

CNA: 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.

There are currently no legacy QID mappings associated with this CVE.