Medium 5.5Published Oct 13, 2026

CVE-2026-79607Xenstore: Guests can crash xenstored during Live Update

Updated under an hour ago (2026-10-19 12:10 UTC)

Does this affect you?

It affects Xen. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Xen

Exploited in the last 30 days

During Xenstore live update the state record for a Xenstore watch with specified watch depth is written with two bytes missing. This results in an inconsistent state when reading the state back in the new Xenstore, causing a crash of Xenstore or wrong Xenstore data.

CVSS: 5.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-119
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 16, 2026
First seen by InfoSec Signals: Oct 13, 2026

Affected products

Affected products

Xen Xen xen:xen (from the name)	consult Xen advisory XSA-514 status unknown	CNA record

References

https://xenbits.xenproject.org/xsa/advisory-514.html
http://www.openwall.com/lists/oss-security/2026/10/13/3
http://xenbits.xen.org/xsa/advisory-514.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.