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EUVD-2026-4882

🗓️ 28 Jan 2026 15:33:44Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 2 Views

Xen skips IBPB when a vCPU returns to its previous CPU, breaking guest task isolation via BTB state.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-23553
28 Jan 202615:33
attackerkb
AlpineLinux
CVE-2026-23553
28 Jan 202615:33
alpinelinux
Circl
CVE-2026-23553
27 Jan 202611:09
circl
CNNVD
Xen security vulnerabilities
28 Jan 202600:00
cnnvd
Citrix
Security Bulletins for XenServer
21 Aug 202406:47
citrix
Citrix
XenServer Security Update for CVE-2025-58151 and CVE-2026-23553
27 Jan 202610:16
citrix
CVE
CVE-2026-23553
28 Jan 202615:33
cve
Cvelist
CVE-2026-23553 x86: incomplete IBPB for vCPU isolation
28 Jan 202615:33
cvelist
Debian CVE
CVE-2026-23553
28 Jan 202615:33
debiancve
EUVD
EUVD-2026-9392
4 Mar 202612:30
euvd
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "32a52d56-5f7c-3dd5-a064-7a5458f74ea0",
        "vendor": {
          "name": "Xen"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "32a52d56-5f7c-3dd5-a064-7a5458f74ea0",
        "product": {
          "name": "Xen"
        },
        "product_version": ""
      }
    ]
  }
]

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28 Jan 2026 16:41Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.12.9
EPSS0.00033
SSVC
2