CVE-2026-79608

criticalpriority · track · 0EPSS 0.004 · 28 %ileDEFR

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.35% (28th) EPSS

CVSS 9.8 · critical

Is it mine?

9 products

Check your exposure

Who says so?

2 sources

cert_bund · certfr

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-670US

affected products (9)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Open Source Xen 4.17.xall versionscert_bundDEcpe:/o:xen:xen:4.17.x
Open Source Xen 4.18.xall versionscert_bundDEcpe:/o:xen:xen:4.18.x
Open Source Xen 4.19.xall versionscert_bundDEcpe:/o:xen:xen:4.19.x
Open Source Xen 4.21.xall versionscert_bundDEcpe:/o:xen:xen:4.21.x
Open Source Xen 4.22.xall versionscert_bundDEcpe:/o:xen:xen:4.22.x
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Xenall versionscert_bundDEcpe:/o:xen:xen:tapdisk

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3930Xen: Mehrere SchwachstellenDeutsch2026-10-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Xen ausnutzen, um beliebigen Code – möglicherweise sogar mit Root-Rechten – auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder einen Denial-of-Service-Zustand auszulösen.
CERTFR-2026-AVI-1302Multiples vulnérabilités dans XenFrançais2026-10-14vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund certfr NVD CVE.org MITRE

published 2026-10-13modified 2026-10-20

references (2) nvd

External citations — patches, advisories, analysis.

scry

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