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CVE-2026-62427

HIGH
8.8
CVSS 3.1
Description
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To manage the system, sysctl and platform operations are used by the control domain or a possible Xenstore domain. Some of these operations may not be executed in parallel, so a system-wide lock each is used. The way those locks are acquired is, however, not providing any fairness. Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking. The sysctl issue is CVE-2026-62426. The platform-op issue is CVE-2026-62427.

Metadata

CVE ID
CVE-2026-62427
State
PUBLISHED
Assigner
XEN
Reserved
2026-07-14 10:28 UTC
Published
2026-07-28 12:31 UTC
Last updated
2026-07-28 15:54 UTC
Primary CWE
CWE-284
CWE-284 Improper Access Control
Vendor / Product
Xen / Xen
Sources
cve.org  ·  NVD

Severity & Metrics

8.8 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/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-499
Weakness (CWE)
CWESourceDescription
CWE-284 adp CWE-284 Improper Access Control
CWE-305 adp CWE-305 Authentication Bypass by Primary Weakness
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.8 HIGH 3.1 adp CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References (1)
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