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A stack-based buffer overflow was found in the QEMU e1000 network device. The code for padding short frames was dropped from individual network devices and moved to the net core code. The issue stems from the device's receive code still being able to process a short frame in loopback mode. This could lead to a buffer overrun in the e1000_receive_iov() function via the loopback code path. A malicious guest user could use this vulnerability to crash the QEMU process on the host, resulting in a denial of service.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade qemu | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jul 17, 2025 |
| Ubuntu | — | Upgrade qemu-system-guiUpgrade qemu-system-armUpgrade qemu-system-commonUpgrade qemu-system-miscUpgrade qemu-system-xenUpgrade qemu-system-sparcUpgrade qemu-system-riscvUpgrade qemu-system-x86-xenUpgrade qemu-system-dataUpgrade qemu-system-modules-spiceUpgrade qemu-system-s390xUpgrade qemu-system-modules-openglUpgrade qemu-system-x86Upgrade qemu-system-ppcUpgrade qemu-systemUpgrade qemu-system-mips | Mar 9, 2026 | Mar 4, 2026 |
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