CVE-2026-102703
Received
Received - Intake
Xen Hypervisor Grant Copy Operation Validation Flaw
Vulnerability report for CVE-2026-102703, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-04
Last updated on: 2026-11-04
Assigner: Xen Project
Description
Description
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
A common access pattern is a batch of Grant Copy operations acting on
adjacent address ranges in the same source or destination page. For
performance reasons, Xen caches details internally to reuse already
validated data. The conditions on when to re-validate the internal data
were not correct in some cases:
- Frame numbers and grant references could wrongly be mixed up. This
is CVE-2026-102703.
- Copying by frame number (rather than grant reference) is permitted
only when operating on the caller's own memory. The check to enforce
this restriction was misplaced. This is CVE-2026-102704.
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
