CVE-2017-7493

Name: CVE-2017-7493
Creator: NVD / NIST
Published: 2017-05-17T15:29:00.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2017-7493 is a high-severity vulnerability rated 7.8/10 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 virtfs metadata files in mapped-file security mode. EPSS estimates a 0.37% 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 virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.37%

28.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.9.1
Debian	Debian Linux	8.0

References

http://seclists.org/oss-sec/2017/q2/278Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/98574Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1451709Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201706-03Third Party Advisory
http://seclists.org/oss-sec/2017/q2/278Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/98574Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1451709Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/201706-03Third Party Advisory

Timeline

Published: May 17, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7493?

How severe is CVE-2017-7493?

CVE-2017-7493 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7493?

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-2017-7493?

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

Scan your code now

Source: NVD / NIST