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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{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "qemu-system-misc": "1:2.11+dfsg-1ubuntu7.20", "qemu-guest-agent-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-block-extra-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-utils-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-user": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-arm-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-kvm": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-ppc-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-user-static": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-arm": "1:2.11+dfsg-1ubuntu7.20", "qemu": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-sparc": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-s390x-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-common-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-x86-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system": "1:2.11+dfsg-1ubuntu7.20", "qemu-guest-agent": "1:2.11+dfsg-1ubuntu7.20", "qemu-utils": "1:2.11+dfsg-1ubuntu7.20", "qemu-block-extra": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-misc-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-sparc-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-mips-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-x86": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-ppc": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-s390x": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-common": "1:2.11+dfsg-1ubuntu7.20", "qemu-user-static-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-system-mips": "1:2.11+dfsg-1ubuntu7.20", "qemu-user-dbgsym": "1:2.11+dfsg-1ubuntu7.20", "qemu-user-binfmt": "1:2.11+dfsg-1ubuntu7.20" } ] }