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.
References10
- access.redhat.com/errata/RHSA-2025:17651
- access.redhat.com/errata/RHSA-2025:17675
- access.redhat.com/errata/RHSA-2025:17710
- access.redhat.com/errata/RHSA-2025:17738
- access.redhat.com/errata/RHSA-2025:17739
- access.redhat.com/errata/RHSA-2025:17740
- access.redhat.com/errata/RHSA-2025:19113
- access.redhat.com/errata/RHSA-2025:19156
- access.redhat.com/errata/RHSA-2025:19276
- access.redhat.com/errata/RHSA-2025:19906
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 63 · as of 8 November 2026
- CWE
- CWE-123
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.