memfd_secret

About this tag
The memfd_secret tag on WindowsForum.com covers discussions about the Linux kernel's secret memory feature, specifically the memfd_secret system call and related security vulnerabilities. Content includes analysis of CVE-2025-40272, a use-after-free race condition in the secret memory fault path that was fixed by reordering cleanup to restore the direct map before freeing the folio. This flaw affects page-fault handling for memfd_secret regions and can cause kernel oopses when concurrent faults occur. The tag is relevant for Linux kernel developers, security researchers, and system administrators interested in memory isolation and hardening of in-memory secrets.

  1. Linux Secretmem UAF Fix for CVE-2025-40272 in memfd_secret Fault Path

    A recently assigned CVE, CVE-2025-40272, identifies a subtle but meaningful use-after-free race in the Linux kernel’s secret memory path (mm/secretmem) that was fixed upstream by reordering fault-handler cleanup so the direct map is restored before the allocated folio is freed. The flaw affects...
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    • cve 2025 40272 linux kernel memfd_secret secretmem
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    • Forum: Security Alerts