CVE-2017-8284

QEMU: privilege escalation via disas_insn function in TCG mode

Loading…

Severity

Low

Red Hat Product Security

4.8

CVSS 3.0

Review impact separately from score.

Published · October 2, 2019

Updated · November 22, 2025

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.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 4.8
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

CWE-94 · Improper Control of Generation of Code ('Code Injection')