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CVE-2026-23553

🗓️ 28 Jan 2026 15:33:44Reported by Alpine Linux Development TeamType 
alpinelinux
 alpinelinux
🔗 security.alpinelinux.org👁 5 Views

CVE-2026-23553: Xen skips Instruction Based Page Barrier during virtual CPU migration, allowing branch target buffer training to leak across tasks.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-23553
28 Jan 202615:33
attackerkb
circl
Circl
CVE-2026-23553
27 Jan 202611:09
circl
cnnvd
CNNVD
Xen security vulnerabilities
28 Jan 202600:00
cnnvd
citrix
Citrix
Security Bulletins for XenServer
21 Aug 202406:47
citrix
citrix
Citrix
XenServer Security Update for CVE-2025-58151 and CVE-2026-23553
27 Jan 202610:16
citrix
cve
CVE
CVE-2026-23553
28 Jan 202615:33
cve
cvelist
Cvelist
CVE-2026-23553 x86: incomplete IBPB for vCPU isolation
28 Jan 202615:33
cvelist
debiancve
Debian CVE
CVE-2026-23553
28 Jan 202615:33
debiancve
euvd
EUVD
EUVD-2026-4882
28 Jan 202615:33
euvd
euvd
EUVD
EUVD-2026-9392
4 Mar 202612:30
euvd
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Alpine Linux3.19anyxen4.18.5-r3xen-4.18.5-r3.apk
Alpine Linux3.20anyxen4.18.5-r9xen-4.18.5-r9.apk
Alpine Linux3.21anyxen4.19.5-r4xen-4.19.5-r4.apk
Alpine Linux3.22anyxen4.20.3-r4xen-4.20.3-r4.apk
Alpine Linux3.23anyxen4.20.3-r4xen-4.20.3-r4.apk
Alpine Linux3.24anyxen4.21.1-r6xen-4.21.1-r6.apk

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17 Jun 2026 10:21Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.12.9
EPSS0.00129
SSVC
5