CVE-2017-7493 Privilege escalation in qemu

What is CVE-2017-7493?

CVE-2017-7493 is a high-severity vulnerability in Debian Debian Linux, published on 17 May 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-732

Which versions are affected by CVE-2017-7493?

It affects 2 products.

Products include Debian Debian Linux, Qemu Qemu.

How do I fix CVE-2017-7493?

Apply the vendor's patch.

Is CVE-2017-7493 being exploited?

There is no known exploitation of CVE-2017-7493 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-7493, GHSA-w8mx-2pfw-8h8q, UBUNTU-CVE-2017-7493.