X.Org Server XKB buffer overflow

Summaryinfo

A vulnerability has been found in X.Org Server and classified as very critical. This affects an unknown function of the component XKB. Performing a manipulation results in buffer overflow. This vulnerability is identified as CVE-2026-93520. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as very critical has been found in X.Org Server (the affected version unknown). This affects an unknown part of the component XKB. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

This vulnerability is uniquely identified as CVE-2026-93520. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/16/2026).

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• X.Org

Name

• Server

License

• open-source

Website

• Vendor: https://www.x.org/

CPE 2.3info

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CPE 2.2info

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