As with the other operating systems, security is the main reason to update to tvOS 11.2.5, which includes 11 security fixes.
The Meltdown issue was first disclosed at the beginning of the month alongside another issue called Spectre that many companies have said is harder to exploit. Spectre and Meltdown are not only affecting different Mac models but overall the entire industry is at stake and tech giants have been working to get it straight.
Two other kernel flaws, CVE-2018-4097 and CVE-2018-4082, allow an app to run code as the kernel, thus hijacking the whole machine. It also patches an issue that could lead to arbitrary code execution when playing a malicious sound file. Multiple memory corruption issues were addressed with improved memory handling.
Available on macOS High Sierra version 10.13.2, the security patch has now been rolled out to older macOS versions, macOS Sierra 10.12.6 and OS X El Capitan 10.11.6. Each of the new operating system releases includes bug fixes and stability improvements, following Apple's rush to address Spectre and Meltdown processor vulnerabilities in an earlier point-point release.
The news-reading feature also comes to iOS devices via the iOS 11.2.5 update that was recently pushed out. tvOS and watchOS also received updates overnight. No user-facing changes apart from bug fixes were noticed in either tvOS 11.2.5 or watchOS 4.2.2.