CVE-2025-40353

CVE-2025-40353 concerns the Linux kernel on ARM64. The issue is in copy_highpage() for MTE-tagged pages: the function assumed a newly allocated destination page is not MTE-tagged, but due to a migration flow, a second copy can occur to the same destination after __folio_migrate_mapping() fails, t...

CVE-2025-40353: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: arm64: mte: Do not warn if the page is already tagged in copyhighpage The arm64 copyhighpage assumes that the destination page is newly allocated and not MTE-tagged PGmtetagged unset and warns accordingly. However, following comm...

Linux Kernel Security Vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the improper handling of tagged pages in copyhighpage, which may result in a warning message...