CVE-2026-79608x86/AMD: ineffectual Zenbleed workaround
Updated under an hour ago ()
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It affects Xen. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- XEN
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
Xen Xen xen:xen (from the name) | consult Xen advisory XSA-515 status unknown | CNA record |
References
- https://xenbits.xenproject.org/xsa/advisory-515.html
- http://xenbits.xen.org/xsa/advisory-515.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.