CVE-2013-6425: Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org...

Security readout for executives and security teams

CVE-2013-6425 is a crash-risk bug in Pixman, a low-level graphics library used by X.Org server and cairo. A specially shaped negative value can trigger an integer underflow and denial of service. The available sources describe crashes, not data theft or code execution. Systems running distro packages with Pixman before 0.32.0, or vendor-backported vulnerable builds, are the main concern. Exposure is most relevant where X.Org server, cairo, or dependent graphical rendering paths process attacker-influenced input. Treat this as a moderate availability risk. It is old and vendor advisories exist, but legacy Linux desktops, servers with X.Org components, or appliances using old graphics stacks should be checked during hygiene reviews. Mitigation focus: Update Pixman to 0.32.0 or a vendor-patched package.; Apply relevant Red Hat, Ubuntu, Debian, or SUSE security updates where applicable.; Check vendor advisories if package versions are backported and version numbers differ..

Prepared

Jun 14, 2026, 14:50 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.