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Kernel control-flow integrity checks arrive in the GCC compiler

At the GNU Tools Cauldron 2026, a kernel developer presented GCC changes to support forward-edge CFI in the kernel, a technique aimed at preventing or detecting diversion of control flow.

According to the machine-translated news item from the LWN feed, published on 9 October 2026, a kernel developer presented at the GNU Tools Cauldron 2026 changes to the GCC compiler suite to support forward-edge control-flow integrity (CFI) in the kernel. CFI is the set of techniques used to prevent, or at least detect, exploits that divert execution away from its intended paths. The source does not detail the implementation, performance results or the release version in which these changes will appear, so those points should not be assumed. For security teams, the relevance is that mitigations of this kind are built into the compiler and kernel, not into AI products. The Rota Nacional platform does not offer CFI verification and has no role in this engineering work. To check the original, consult the LWN article referenced in the bookmark and follow the official GCC release notes.

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