Linux 6.13 release on track after engineers from Intel and AMD stepped in to address issues caused by a code contribution from a Microsoft developer. The change, made last autumn, aimed to improve performance but caused problems on some systems, including those with Control Flow Integrity (CFI) enabled.
The Linux kernel maintainers were not notified about the change, which was reviewed by Intel’s Peter Zijlstra and AMD’s Borislav Petkov before being disabled. Microsoft engineer working on patches has acknowledged that the code is still buggy and not yet ready for release.
This incident highlights concerns over quality control standards at Microsoft and the need for better review processes to prevent similar issues in the future. The Linux kernel 6.13 is now back on track, with the troublesome code removed from the stable release build.
Source: https://www.theregister.com/2025/01/14/microsoft_linux_change_pulled