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Python CVE-2026-62427

| EUVDEUVD-2026-49778 HIGH
Improper Access Control (CWE-284)
2026-07-28 security@xen.org GHSA-92vf-cq3f-7mp6
8.8
CVSS 3.1 · Vendor: xen
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Severity by source

Vendor (xen) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SUSE
5.9 MEDIUM
AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Primary rating from Vendor (xen).

CVSS VectorVendor: xen

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 28, 2026 - 18:36 vuln.today
Severity Changed
Jul 28, 2026 - 16:22 NVD
MEDIUM HIGH
CVSS changed
Jul 28, 2026 - 16:22 NVD
5.5 (MEDIUM) 8.8 (HIGH)
CVE Published
Jul 28, 2026 - 13:19 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 28, 2026 - 13:19 cve.org
HIGH 8.8

DescriptionCVE.org

[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.

AnalysisAI

Privilege escalation in Xen hypervisor due to lock acquisition unfairness in platform operations allows authenticated control-domain users to bypass XSM/Flask permission checks. An attacker with low-privileged authenticated access can exploit the race condition to execute privileged operations, potentially gaining full control of the system. The vulnerability carries a CVSS 8.8 rating but has no known active exploitation or public exploit code.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed
SUSE Linux Enterprise Micro 5.3 Fixed

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CVE-2026-62427 vulnerability details – vuln.today

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