Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS.

Published 8 y ago 2018-04-26 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.6

v3.0 · CNA

CISA KEV

not known exploited

EPSS

3.6%

percentile 90%

Public exploits

none known

Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. 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.

Exploit prediction (EPSS)

3.65% probability of exploitation in the next 30 days, higher than 90% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.0	7.6	`CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`
CNA	3.0	7.6	`CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`
NVD	3.0	8.8	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	9.0	`AV:N/AC:L/Au:S/C:C/I:C/A:C`

Affected products

unspecified Qemu

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access

References

lists.gnu.org /archive/html/qemu-devel/2017-02/msg04347.html · mailing-list, x_refsource_MLIST, x_transferred
securitytracker.com /id/1037604 · vdb-entry, x_refsource_SECTRACK, x_transferred
lists.debian.org /debian-lts-announce/2018/09/msg00007.html · mailing-list, x_refsource_MLIST, x_transferred
bugzilla.redhat.com /show_bug.cgi?id=CVE-2016-9602 · x_refsource_CONFIRM, x_transferred
openwall.com /lists/oss-security/2017/01/17/12 · mailing-list, x_refsource_MLIST, x_transferred
lists.gnu.org /archive/html/qemu-devel/2017-01/msg06225.html · mailing-list, x_refsource_MLIST, x_transferred
security.gentoo.org /glsa/201704-01 · vendor-advisory, x_refsource_GENTOO, x_transferred
securityfocus.com /bid/95461 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2016-9602
NVD: CVE-2016-9602

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