Description
A flaw was found in KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets. By replacing the console socket with a symlink to the host's container runtime (CRI-O) socket, an attacker can hijack virt-handler's privileged connection. This enables the attacker to access any Unix socket on the host, potentially leading to full control of the node and the entire cluster.
Problem types
Improper Link Resolution Before File Access ('Link Following')
Product status
1779375376 (rpm) before *
1778999881 (rpm) before *
1779321599 (rpm) before *
1778859977 (rpm) before *
1778861274 (rpm) before *
1779174925 (rpm) before *
1778887155 (rpm) before *
1779289071 (rpm) before *
1779288737 (rpm) before *
1779420069 (rpm) before *
Timeline
| 2026-04-22: | Reported to Red Hat. |
| 2026-05-26: | Made public. |
Credits
This issue was discovered by Sarah Bennert (Red Hat) and Stoyan Nikolov (Red Hat).
References
access.redhat.com/errata/RHSA-2026:20720 (RHSA-2026:20720)
access.redhat.com/errata/RHSA-2026:20736 (RHSA-2026:20736)
access.redhat.com/errata/RHSA-2026:20763 (RHSA-2026:20763)
access.redhat.com/errata/RHSA-2026:20767 (RHSA-2026:20767)
access.redhat.com/errata/RHSA-2026:20782 (RHSA-2026:20782)
access.redhat.com/errata/RHSA-2026:20825 (RHSA-2026:20825)
access.redhat.com/errata/RHSA-2026:20866 (RHSA-2026:20866)
access.redhat.com/errata/RHSA-2026:20886 (RHSA-2026:20886)
access.redhat.com/errata/RHSA-2026:20890 (RHSA-2026:20890)
access.redhat.com/errata/RHSA-2026:20975 (RHSA-2026:20975)
access.redhat.com/security/cve/CVE-2026-7374
bugzilla.redhat.com/show_bug.cgi?id=2463728 (RHBZ#2463728)