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CVE-2026-42488

HIGH
8.1
CVSS 3.1
Description
Some shadow paging errors paths will switch the page-tables without updating the currently running vCPU reference. This causes a mismatch between the loaded page-tables and the mapcache metadata which can lead to corruption of the mapcache.

Metadata

CVE ID
CVE-2026-42488
State
PUBLISHED
Assigner
XEN
Reserved
2026-04-27 14:20 UTC
Published
2026-06-18 13:47 UTC
Last updated
2026-06-18 15:07 UTC
Primary CWE
CWE-119
CWE-119 Improper Restriction of Operations within the Bounds…
Vendor / Product
Xen / Xen
Sources
cve.org  ·  NVD

Severity & Metrics

8.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Xen Xen — consult Xen advisory XSA-494
Weakness (CWE)
CWESourceDescription
CWE-119 adp CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.1 HIGH 3.1 adp CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References (1)
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