This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-62432 →

DEBIAN-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 EVTCHN...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.7-0+deb12u1"}]}]

Debian:13 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.3+127-gc42374a105-0+deb13u1"}]}]

Debian:14 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.3+127-gc42374a105-1"}]}]

References

advisory security-tracker.debian.org