Xen Project Meltdown and Spectre Technical FAQ

Where can I find the current patch series that fixes Meltdown/SP3

Please refer to XSA-254 for more details.

Where can I find the current patch series that fixes Spectre/SP2

See

• x86: Mitigations for SP2/CVE-2017-5715/Branch Target Injection
• xen/arm64: Branch predictor hardening (XSA-254 variant 2)
• xen/arm32: Branch predictor hardening (XSA-254 variant 2)
• Note that newer versions of these patches appear at high velocity: please always check the xen-devel@ archives for the latest version

Is there any practical advice about responding to XSA-254 (also known as the 'Meltdown' and 'Spectre' vulnerabilities)?

See Respond to Meltdown and Spectre, our FAQ and XSA 254.

What are some dependencies between Xen features, guest types and mitigations?

Please refer to the OpenXT spreadsheet, Meltdown and Spectre Exposure Analysis: Xen, Linux & Windows.