What’s Vulnerable › Vulnerabilities
CVE-2026-109088: libXtst RECORD EnableContext Reply Endless Loop
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-27 · updated 2026-10-28
- Weakness: CWE-835
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.
Affected products
- x.org libXtst: before 1.2.6 — fixed in 1.2.6
How to fix
Upgrade to a fixed version: x.org libXtst 1.2.6. Check the vendor advisory for mitigations.
References
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