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Xenstore: Guests can crash xenstored during Live Update

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-79607

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-79607

Xen

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Xen",
    "product": "Xen",
    "versions": [
      {
        "status": "unknown",
        "version": "consult Xen advisory XSA-514"
      }
    ],
    "defaultStatus": "unknown"
  }
]
Related CVEs
CVE-2026-79607

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#32929 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement