x.org libXi up to 1.8.3 XI2 class parser out-of-bounds

Summaryinfo

A vulnerability classified as problematic has been found in x.org libXi up to 1.8.3. This affects the function XI2 class parser. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2026-93543. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in x.org libXi up to 1.8.3. It has been rated as problematic. This issue affects the function XI2 class parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.

It is possible to read the advisory at gitlab.freedesktop.org. The identification of this vulnerability is CVE-2026-93543 since 09/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful 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.

Upgrading to version 1.8.4 eliminates this vulnerability.

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

Productinfo

Vendor

• x.org

Name

• libXi

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3

License

• open-source

Website

• Vendor: https://www.x.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

Discussion