CVE-2006-1526: X.org x11r6

Low severity, CVSS 2.1. EPSS: 0.5% chance of exploitation in the next 30 days.

Buffer overflow in the X render (Xrender) extension in X.org X server 6.8.0 up to allows attackers to cause a denial of service (crash), as demonstrated by the (1) XRenderCompositeTriStrip and (2) XRenderCompositeTriFan requests in the rendertest from XCB xcb/xcb-demo, which leads to an incorrect memory allocation due to a typo in an expression that uses a "&" instead of a "*" operator. NOTE: the subject line of the original announcement used an incorrect CVE number for this issue.

Affected products

• X.org x11r6: version 6.7.0 only; version 6.8 only; version 6.8.1 only; version 6.9 only

Published 2006-05-02. Last modified 2026-06-16.