xen: The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later re-worked to better integrate with other manipulation...
CVE-2026-79608 is fixed in xen on 1 platform, first by DEBIAN-CVE-2026-79608, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
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
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| xen · Debian 13.5 (trixie) | 4.20.4+39-gf1e1321c87-0+deb13u1 | DEBIAN-CVE-2026-79608 | Oct 19, 2026 |
| xen · Debian 14 | 4.20.4+39-gf1e1321c87-1 | DEBIAN-CVE-2026-79608 | Oct 19, 2026 |
| xen · sles 15.7 | 4.20.4_06-150700.3.49.2 | SUSE-SU-2026:4942-1 | Nov 7, 2026 |
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