CVE-2026-79608 Affecting xen package, versions <4.20.4+39-gf1e1321c87-0+deb13u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN13-XEN-20888273
- published14 Oct 2026
- disclosed13 Oct 2026
Introduced: 13 Oct 2026
NewCVE-2026-79608 (opens in a new tab)How to fix?
Upgrade Debian:13 xen to version 4.20.4+39-gf1e1321c87-0+deb13u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
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