CVE-2026-62426: 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-2026-62426?
The severity of CVE-2026-62426 is high, with a CVSS score of 8.8.
How do I fix CVE-2026-62426?
To fix CVE-2026-62426, ensure you apply the latest patches or updates provided for the Xen Project Hypervisor.
What systems are affected by CVE-2026-62426?
CVE-2026-62426 affects systems running the Xen Project Xen Hypervisor that utilize sysctl and platform operations.
What are the potential impacts of CVE-2026-62426?
The potential impacts of CVE-2026-62426 include unauthorized access and manipulation of system operations due to improper locking.
Is CVE-2026-62426 exploitable remotely?
Yes, CVE-2026-62426 is remotely exploitable under certain conditions, as it involves vulnerabilities in sysctl and platform operations.