CVE-2017-8284

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.

• CWE-94

• https://bugs.chromium.org/p/project-zero/issues/detail?id=1122Issue Tracking, Third Party Advisory
• https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14Issue Tracking, Patch, Third Party Advisory
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1122Issue Tracking, Third Party Advisory
• https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14Issue Tracking, Patch, Third Party Advisory

Published

Apr 26, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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