CVE-2026-62427: sysctl and platform-op locks open to abuse
[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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62427?
CVE-2026-62427 has a risk rating of 37, indicating a moderate level of severity.
How do I fix CVE-2026-62427?
To mitigate CVE-2026-62427, ensure that updates for sysctl and platform operations are applied and configure proper access controls.
What systems are affected by CVE-2026-62427?
CVE-2026-62427 affects systems that utilize sysctl and platform operations, particularly those in control and Xenstore domains.
What type of vulnerability is CVE-2026-62427?
CVE-2026-62427 is a vulnerability related to improper locking mechanisms in sysctl and platform operations that may lead to abuse.
When was CVE-2026-62427 published?
CVE-2026-62427 was published on July 28, 2026.