CVE-2017-8284

HIGH

QEMU < 2.8.1.1 - Local Privilege Escalation via TCG Mode Instruction Size Overflow

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/project-zero/issues/detail?id=1122

Scores

CVSS v3 7.0
EPSS 0.0011
EPSS Percentile 28.5%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-94
Status published
Products (1)
qemu/qemu < 2.8.1.1
Published Apr 26, 2017
Tracked Since Feb 18, 2026