https://seclists.org/oss-sec/2026/q4/143: Xen Security Advisory 515 v2 (CVE-2026-79608) - x86/AMD: ineffectual Zenbleed workaround
Published Oct 13, 2026
·Updated
Affected Software
1 affected component
Xen Project Xen>=4.19.4, >=4.20.3, >=4.21.1, =4.22
Frequently Asked Questions
1
Which Xen release lines are affected?
Affected releases are Xen 4.19.4 and later, 4.20.3 and later, 4.21.1 and later, and 4.22. Xen 4.18, 4.19.3 and earlier, 4.20.2 and earlier, and 4.21.0 are not affected.
2
Is vulnerable Xen sufficient for exploitation?
No. The issue can only be leveraged on systems running out-of-date microcode.