CVE-2026-79607 (GCVE-0-2026-79607)

Vulnerability from cvelistv5 – Published: 2026-10-13 15:43 – Updated: 2026-10-13 16:13
VLAI
Title
Xenstore: Guests can crash xenstored during Live Update
Summary
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.
Severity
No CVSS data available.
Assigner
XEN CNA under the mitre root
CNA scorecard D 56/100 over 46 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Xen Xen Unknown: consult Xen advisory XSA-514
guessed Create a notification for this product.
Date Public
2026-10-13 12:00
Credits
This issue was discovered by Andrii Sultanov of Vates.
Show details on NVD website
To clipboard 

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          "value": "Only systems running Xen 4.22 are vulnerable.  Systems running Xen 4.21\nor older are not vulnerable.\n\nOnly systems running C xenstore either as daemon or as stubdom are\nvulnerable. Systems running oxenstored are not vulnerable."
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          "value": "During Xenstore live update the state record for a Xenstore watch with\nspecified watch depth is written with two bytes missing.  This results\nin an inconsistent state when reading the state back in the new Xenstore,\ncausing a crash of Xenstore or wrong Xenstore data."
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      "impacts": [
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            {
              "lang": "en",
              "value": "An unprivileged guest can cause the Xenstore service to crash or to get\ncorrupted during a live update of Xenstore, causing a DoS of the host\nregarding further domain administration actions."
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      "title": "Xenstore: Guests can crash xenstored during Live Update",
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          "value": "Not doing a live update of Xenstore avoids the vulnerability.\n\nSwitching to oxenstored avoids the vulnerability."
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    "datePublished": "2026-10-13T15:43:43.425Z",
    "dateReserved": "2026-08-25T07:35:05.289Z",
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