CVE-2026-79608
x86/AMD: ineffectual Zenbleed workaround
- State
- Published
- Severity
- 9.8 Critical
- Published
- Oct 13, 2026
- Updated
- Oct 20, 2026
- Reserved
- Aug 25, 2026
Description
The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later re-worked to better integrate with other manipulations of the same MSR. In this rework an inverted conditional was introduced, resulting in the workaround to not be applied when needed and vice versa.
For more details, see: http://xenbits.xen.org/xsa/advisory-433.html
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-670 Always-Incorrect Control Flow Implementation
Affected Products
| Product | Versions |
|---|---|
XenXen |
|
References
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.