CVE-2026-79607

UNKNOWN 0.0

Xenstore: Guests can crash xenstored during Live Update

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	xen
Product	xen
Published	Oct 13, 2026
Last Updated	Oct 13, 2026

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Affected Versions

Xen / Xen

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

This issue was discovered by Andrii Sultanov of Vates.