CVE-2017-8284

Name: CVE-2017-8284
Creator: NVD / NIST
Published: 2017-04-26T14:59:00.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.43%

Last modified Jun 17, 2026

CVE-2017-8284 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

0.43%

34.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.8.1.1

References

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

Timeline

Published: Apr 26, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8284?

How severe is CVE-2017-8284?

Severity scoring for CVE-2017-8284 is pending analysis. The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8284?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8284?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST