CVE-2017-8284: Qemu

High severity, CVSS 7.0. EPSS: 0.4% chance of exploitation in the next 30 days.

The disas_insn function in target/i386/translate.c in QEMU before 2.9.0, when TCG mode without hardware acceleration is used, does not limit the instruction size, which allows local users to gain privileges by creating a modified basic block that injects code into a setuid program, as demonstrated by procmail. NOTE: the vendor has stated "this bug does not violate any security guarantees QEMU makes.

Affected products

• Qemu Qemu: up to and including 2.8.1.1

Published 2017-04-26. Last modified 2026-06-17.