CVE-2024-0564

Summary

CVE-2024-0564 is a vulnerability affecting the Linux kernel's memory deduplication mechanism, specifically the Kernel Samepage Merging (KSM) feature. Introduced in Linux kernel version 4.4.0-96.119, KSM's maximum page sharing setting, when set to the default value of 256, can create a side channel. When the attacker and victim share the same host, an attacker can potentially time the unmap operation to merge with the victim's page, leaking their page contents. This vulnerability can lead to information disclosure, depending on whether additional physical pages are created beyond the KSM maximum page share.

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