CVE-2026-62432

The EVTCHNOP_expand_array hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOP_reset, resulting in dereferencing a NULL pointer.

Score

CVSS 3.1 7.3 High

Status

Deferred - security@xen.org

Published

2026-07-28

Last modified

2026-07-28

Weaknesses

CWE-362

Affected products

• Xen (Xen)

References

• https://xenbits.xenproject.org/xsa/advisory-505.html
• http://www.openwall.com/lists/oss-security/2026/07/28/21
• http://xenbits.xen.org/xsa/advisory-505.html