CVE-2007-5729: Debian Linux

High severity, CVSS 7.2. EPSS: 0.6% chance of exploitation in the next 30 days.

The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 "mtu" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the mtu overflow vulnerability.

Affected products

• Debian Debian Linux: version 3.1 only; version 4.0 only
• Opensuse Opensuse: version 11.0 only; version 11.1 only
• Qemu Qemu: version 0.8.2 only

Published 2007-10-30. Last modified 2026-06-16.