libx11: InitExt.c: Add bounds checks for extension request, event, & error codes https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/304a654a0d57bf0f00d8998185f0360332cfa36c CREATE(Triage):(User=admin) CVE-2023-3138 (https://nvd.nist.gov/vuln/detail/CVE-2023-3138)