On June 15, the FreeBSD project officially released FreeBSD 15.1-RELEASE, the latest stable version of the BSD operating system. The release date had been delayed by about two weeks due to last-minute problems. The new version brings updates in many aspects such as user mode software, driver support and security capabilities, and also removes some cloud environment support that is no longer suitable.
In terms of system components, FreeBSD 15.1 integrates several updated user-space packages and officially removes support for Oracle Cloud Infrastructure (OCI). DTrace can now work normally on 32-bit PowerPC and PowerPC64LE platforms, further improving debugging and performance analysis capabilities under these platforms. In addition, the system supports switching between different CPU schedulers during the boot phase through the "kern.sched" tunable, providing more room for tuning system behavior under different workloads.
In terms of storage and acceleration, FreeBSD 15.1 has improved the NVMe driver, which is expected to bring better stability and performance in high-performance storage scenarios. The new version also adds support for the newer generation Intel QuickAssist (QAT 402xx) hardware accelerator, which helps to better utilize hardware capabilities in computing-intensive tasks such as encryption, decryption, and compression. OpenZFS file system support has also been updated, combined with other underlying improvements, to provide server and workstation users with better storage capabilities and data reliability.
In terms of network and security, FreeBSD 15.1 brings a variety of updated Wi-Fi drivers, which are derived from the Linux 7.0 source tree and are expected to improve wireless network device compatibility and driver quality. On the x86_64 (AMD64) platform, the system adds support for Intel Linear Address Space Separation (LASS) to strengthen address space isolation and further improve security. At the same time, many updates have been made to the man page to reflect new features and behavioral changes, making it easier for users to review and operate.
One aspect of this release that's getting a lot of attention but isn't ready yet is improvements to the "out-of-the-box" installation experience on the KDE desktop. This work was originally planned to be launched in 15.1, but has been postponed to a future FreeBSD 15.2 version.
Detailed changes for FreeBSD 15.1 can be found in the official 15.1 release notes, which contain a complete list of changes compared to the 2025 release of FreeBSD 15.0. Users can obtain the 15.1 download image and more release information through the FreeBSD official website:
https://www.freebsd.org/releases/15.1R/announce/