CVE-2025-9900
Published: September 23, 2025Last modified: September 24, 2025
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | REQUIRED |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | tiff | Unknown (4.4.0-r1) |
| 25 LTS | tiff | Fixed (4.7.1-r0) | |
| Stream | tiff | Fixed (4.7.1-r0) |
References
- http://www.openwall.com/lists/oss-security/2025/09/26/3
- 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://access.redhat.com/errata/RHSA-2025:19906
- 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-2025:21060
- https://access.redhat.com/errata/RHSA-2025:21061
- https://access.redhat.com/errata/RHSA-2025:21062
- 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
- https://access.redhat.com/errata/RHSA-2025:21994
- 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://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://lists.debian.org/debian-lts-announce/2025/09/msg00031.html