CVE-2026-93543
HighCVSS 7.4Summary
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.
Risk Assessment
An attacker controlling an X server can crash X client applications using libXi, potentially disrupting user work. It might also be leveraged for other attacks.
Recommendation
Update libXi to 1.8.4 or later. If not possible, limit trust in X servers.
Other vulnerabilities in libXi
See all- CVE-2026-94281Medium
An out-of-bounds read in libXi's XListInputDevices() class parsing in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
- CVE-2026-93545Medium
An out-of-bounds read in libXi's XListInputDevices() in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
- CVE-2026-93544Medium
An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.
- CVE-2026-93542Medium
An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicious servers to crash the X client.
- CVE-2026-93541Medium
An out-of-bounds read in libXi's XQueryDeviceState() before version 1.8.4 could be exploited by an attacker. The description is incomplete, but the vulnerability may lead to information disclosure or a crash.
- CVE-2016-7946High
LibXi versions before 1.7.7 allow remote X servers to cause a denial of service via an infinite loop involving length fields.
Original NVD description (English source)
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.