Vulnerability Description
A flaw was found in the Linux kernel's memory deduplication mechanism. The max page sharing of Kernel Samepage Merging (KSM), added in Linux kernel version 4.4.0-96.119, can create a side channel. When the attacker and the victim share the same host and the default setting of KSM is "max page sharing=256", it is possible for the attacker to time the unmap to merge with the victim's page. The unmapping time depends on whether it merges with the victim's page and additional physical pages are created beyond the KSM's "max page share". Through these operations, the attacker can leak the victim's page.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4.0-96.119, <= 5.15.0-58 |
| Redhat | Enterprise Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2024-0564Third Party Advisory
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680513ExploitIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=2258514Issue Tracking
- https://link.springer.com/conference/wisaNot Applicable
- https://wisa.or.kr/acceptedNot Applicable
- https://access.redhat.com/security/cve/CVE-2024-0564Third Party Advisory
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680513ExploitIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=2258514Issue Tracking
- https://link.springer.com/conference/wisaNot Applicable
- https://wisa.or.kr/acceptedNot Applicable
FAQ
What is CVE-2024-0564?
CVE-2024-0564 is a vulnerability with a CVSS score of 5.3 (MEDIUM). A flaw was found in the Linux kernel's memory deduplication mechanism. The max page sharing of Kernel Samepage Merging (KSM), added in Linux kernel version 4.4.0-96.119, can create a side channel. Whe...
How severe is CVE-2024-0564?
CVE-2024-0564 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-0564?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux.