CVE-2026-62427 — sysctl and platform-op locks open to abuse

Description (CNA)

[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 (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-499

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-499.html

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.