CVE-2026-4775: Libtiff: libtiff: arbitrary code execution or denial of service via signed integer overflow in tiff file processing

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-24 · updated 2026-10-26
Weakness: CWE-190

Description

A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.

Affected products

Debian Linux: 11.0
libtiff: before 4.7.2 — fixed in 4.7.2
Red Hat AI Inference Server: from 3.2.0 before 3.2.2; from 3.3.0 before 3.3.5 — fixed in 3.2.2, 3.3.5
RedHat Codeready Linux Builder: 8.0, 9.0, 10.0
RedHat Codeready Linux Builder Eus: 9.4, 9.6, 10.0
Red Hat Enterprise Linux: 6.0, 8.0, 9.0, 10.0
RedHat Enterprise Linux Els: 7.0
RedHat Enterprise Linux Eus: 8.4, 9.4, 9.6, 10.0
RedHat Enterprise Linux Server Aus: 8.4, 8.6
RedHat Enterprise Linux Server Tus: 8.6, 8.8
RedHat Enterprise Linux Update Services For Sap Solutions: 8.6, 8.8, 9.0, 9.2
RedHat Hardened Images: all versions
Red Hat OpenShift AI 2.25: from 3.4 before 3.4.3 — fixed in 3.4.3

How to fix

Upgrade to a fixed version: libtiff 4.7.2; Red Hat AI Inference Server 3.2.2, 3.3.5; Red Hat OpenShift AI 2.25 3.4.3. Check the vendor advisory for mitigations.

References

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