Vulnerability monitoring firm Secunia said today that the flaw was "moderately critical. It was caused due to a buffer size calculation error within the X Render extension triangle handling code, according to a Secunia advisory.
Secunia recommended that affected users apply an available patch for the flaw.
Coverity, a San Francisco-based company auditing open-source security for DHS, found the flaw, calling it the biggest X Window flaw found in years, according to a report by eWeek.
The flaw could be used to allow local users to execute code with root privileges, according to Secunia's report.
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