CVE-2017-7493

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-05-17 · updated 2026-06-17
Weakness: CWE-732

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.

Affected products

Debian Linux: 8.0
QEMU: through 2.9.1

References

http://seclists.org/oss-sec/2017/q2/278
http://www.securityfocus.com/bid/98574
https://bugzilla.redhat.com/show_bug.cgi?id=1451709
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html
https://security.gentoo.org/glsa/201706-03
http://seclists.org/oss-sec/2017/q2/278
http://www.securityfocus.com/bid/98574
https://bugzilla.redhat.com/show_bug.cgi?id=1451709
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03663.html
https://security.gentoo.org/glsa/201706-03

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