Memory Access Vulnerability in Linux Kernel Affects Multiple Architectures
CVE-2025-39715
What is CVE-2025-39715?
In the Linux kernel, a vulnerability has been identified where user code can exploit improper read access handling during LWS operations. Specifically, the vulnerability arises from the inability to trigger read access interruptions at privilege levels 2 and 3 due to the kernel and gateway page executing at privilege level 0. As a result, it allows unauthorized execution of compare and swap operations at addresses that should be read-protected. The fix involves enhancing the probing of read access rights at privilege level 3, ensuring any access violations are properly handled. This vulnerability highlights the importance of rigorous access control in memory operations to prevent potential exploitation by malicious actors.
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Affected Version(s)
Linux d0585d742ff2d82accd26c661c60a6d260429c4a
Linux d0585d742ff2d82accd26c661c60a6d260429c4a < 8bccf47adbf658293528e86960e6d6f736b1c9f7
Linux d0585d742ff2d82accd26c661c60a6d260429c4a