CVE-2026-109088EUVD-2026-111114GHSA-4RPX-8967-P725
libXtst RECORD EnableContext Reply Endless Loop
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.2.6
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The libXtst library, which provides X Window System extension support for X11 client applications, is affected. A malicious X server can send malformed RECORD EnableContext replies that cause a connected X client to enter an endless loop, leading to a denial of service (the client hangs and stops responding).
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- libXtst
fixed in 1.2.6