Xorg Server 26.0.99.902, the second release candidate for the 26.1.0 branch, has been released with significant security hardening and ABI bumps. This release breaks backward compatibility with video drivers and extensions, increasing the video driver ABI to 28.0 and the extension ABI to 11.0, necessitating that packagers rebuild everything against the new code. Security improvements include bounds checking for malformed X Input resolution data and fixes for byte-swapping errors affecting big-endian architectures. Additionally, the X server's build system has transitioned to a strictly meson-based approach, enhancing usability for gaming applications by ensuring compatibility with Valve's Proton 8 and later

Xorg Server 26.1.0 RC2 Lands with Security Hardening and ABI Bumps

Xorg Server 26.0.99.902, the second release candidate for the standalone 26.1.0 branch, arrived today, alongside a coordinated launch of Xwayland RC2. The release breaks backward compatibility with video drivers and extensions, bumping the VIDEODRV ABI to 28.0 and the EXTENSION ABI to 11.0. Security receives notable hardening through Olivier Fourdan's request bounds checking for malformed X Input resolution data, while Lukáš Lipinský fixes critical byte-swapping bugs for big-endian architectures like PowerPC. On the usability front, the X server now includes a Proton 8 refresh rate workaround and drops autoconf support in favor of a strictly meson-based build system.

Xorg Server 26.1.0 RC2 Lands with Security Hardening and ABI Bumps @ Linux Compatible