CVE-2026-102703: Xen · arbitrary read/write via grant copy
Affects XenSource CVE Database V5
Mentioned vulnerabilities
Not known to be exploited.
Data as of 4 Nov 2026, 11:13 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 4 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| XenXen | Affected– | Fixed in– |
Description
CVE-2026-102703 is a vulnerability in Xen related to improper caching and validation of grant copy operations. Specifically, frame numbers and grant references could be mixed up due to incorrect conditions on when to re-validate cached data. This flaw allows arbitrary read and write operations via grant copy. No affected versions or patch information are provided.