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By Zayden R., August 19, 2026
Fedora Project plans to limit AF_ALG use in its next release following security issues. Engineers should prepare for changes as the deprecated interface faces eventual removal.
The Fedora Project has announced plans to restrict the use of the AF_ALG interface in its upcoming release. This move comes in response to recent security vulnerabilities associated with the Linux kernel's user-space interface to the Crypto API. Engineers who still rely on AF_ALG should take note, as this is a clear signal that the interface's days are numbered.
AF_ALG has been under scrutiny due to its link to several high-profile security problems, including the notorious Copy Fail vulnerability and its successors. These issues prompted the decision to deprecate the interface earlier this year. Eric Biggers, along with other kernel developers, has been actively working to remove AF_ALG from the kernel altogether.
For system administrators and developers, the impending restriction in Fedora serves as both a warning and an opportunity to transition away from AF_ALG. Fedora's proactive approach aims to nudge remaining users of the API to prepare for its eventual removal, encouraging a shift towards more secure alternatives.
While the exact timeline for the complete removal of AF_ALG from the Linux kernel is not yet clear, Fedora's decision to restrict its use in the next release is a significant step in that direction. Engineers should start examining their systems and software dependencies to identify any reliance on AF_ALG and begin planning for a migration path. This is a solid improvement for the security stance of Linux distributions and a necessary move to mitigate potential threats.
As the Linux community continues to prioritize security, the deprecation and eventual removal of vulnerable interfaces like AF_ALG highlight the ongoing efforts to maintain the integrity of the ecosystem. Fedora's initiative is a part of this broader push, and users should be prepared for similar changes from other distributions in the future.
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