CVE-2026-88807libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow

Description

A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://gitlab.freedesktop.org/xorg/lib/libxrender/-/merge_requests/19 patch