qemu-bridge-helper.c in QEMU 3.1 and 4.0.0 does not ensure that a network interface name (obtained from bridge.conf or a --br=bridge option) is limited to the IFNAMSIZ size, which can lead to an ACL bypass.
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"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-13164.json"