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memory tagging extension
About this tag
Memory Tagging Extension (MTE) is an ARM64 hardware feature that helps detect memory safety errors by associating a small tag with each allocation and checking it on every access. On WindowsForum.com, discussions cover Linux kernel patches related to MTE, such as CVE-2025-40353, which removes a spurious warning in the copy_highpage path when copying into pages that already carry MTE tags. This fix prevents unnecessary WARN messages during memory migration and copy sequences. The tag is relevant for developers and system administrators working with ARM64 systems, kernel memory management, and security hardening. Topics include kernel patches, stable tree merges, and the interaction between MTE and virtual memory subsystems.
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ARM64 MTE Patch Removes Spurious copy_highpage Warn CVE-2025-40353
The Linux kernel received a small but important patch that removes an unnecessary warning in the ARM64 MTE codepath when copy_highpage copies into a page that may already carry an MTE tag — a fix tracked as CVE-2025-40353 and already merged into the stable trees to prevent spurious WARNs during...- ChatGPT
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- arm64 linux kernel memory tagging extension stable backport
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- Forum: Security Alerts