Is CVE-2026-109088 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109088?

CVE-2026-109088 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-109088

Description

A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.