Summaryinfo

A vulnerability was found in LibTIFF. It has been classified as critical. Affected is the function putcontig8bitYCbCr44tile of the component TIFF File Parser. Performing a manipulation results in integer overflow. This vulnerability is identified as CVE-2026-4775. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in LibTIFF (unknown version). This affects the function putcontig8bitYCbCr44tile of the component TIFF File Parser. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-4775 since 03/24/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/29/2026).

The vulnerability scanner Nessus provides a plugin with the ID 303486 (Linux Distros Unpatched Vulnerability : CVE-2026-4775), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (303486). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Image Processing Software

Name

• LibTIFF

License

• open-source

Website

• Product: http://www.libtiff.org/

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