CVE-2017-7471

Name: CVE-2017-7471
Creator: NVD / NIST
Published: 2018-07-09T14:29:00.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2017-7471 is a critical-severity vulnerability rated 9/10 on the CVSS scale. Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Metrics

CVSS 3.1

9/10

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.85%

53.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions	Update
Qemu	Qemu	<= 2.8.1.1	—
Qemu	Qemu	2.9.0	Rc0

References

http://www.openwall.com/lists/oss-security/2017/04/19/2Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/97970Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7471Issue Tracking, Patch, Third Party Advisory
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=9c6b899f7a46893ab3b671e341a2234e9c0c060e
https://security.gentoo.org/glsa/201706-03Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/04/19/2Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/97970Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7471Issue Tracking, Patch, Third Party Advisory
https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=9c6b899f7a46893ab3b671e341a2234e9c0c060e
https://security.gentoo.org/glsa/201706-03Third Party Advisory

Timeline

Published: Jul 9, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7471?

How severe is CVE-2017-7471?

CVE-2017-7471 has a CVSS score of 9/10 (CRITICAL severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7471?

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-2017-7471?

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

Scan your code now

Source: NVD / NIST