CVE-2016-9602
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
02 Description
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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.64% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.2% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-04-26 19:00Z8 YR AGO
- Last updated
- 2024-08-06 02:59Z2 YR AGO
- Reserved
- 2016-11-23
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.6)
- CNA CVSS vector
- CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-59Improper Link Resolution Before File Access ('Link Following')Base
- Data version
- 5.1
- Document digest
- e5b5fa601d47fdbbdf46160af81a78a9b5fd4e2e5c10767823ee2fa918989dc2
05 Affected products
06 References
- lists.gnu.org[qemu-devel] 20170220 [PATCH 00/29] 9pfs: local: fix vulnerability to symlink attackshttps://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04347.html
- www.securitytracker.com1037604http://www.securitytracker.com/id/1037604
- lists.debian.org[debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9602
- www.openwall.com[oss-security] 20170117 CVE-2016-9602 Qemu: 9p: virtfs allows guest to access host filesystemhttp://www.openwall.com/lists/oss-security/2017/01/17/12
- lists.gnu.org[qemu-devel] 20170130 [PATCH RFC 00/36] 9pfs: local: fix vulnerability to symlink attackshttps://lists.gnu.org/archive/html/qemu-devel/2017-01/msg06225.html
- security.gentoo.orgGLSA-201704-01https://security.gentoo.org/glsa/201704-01
- www.securityfocus.com95461http://www.securityfocus.com/bid/95461
07 Fixed in
Debian 12
- qemu Fixed in 1:2.8+dfsg-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- qemu Fixed in 1:2.8+dfsg-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- qemu Fixed in 1:2.8+dfsg-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- qemu Fixed in 2.0.0+dfsg-2ubuntu1.33
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- qemu Fixed in 1:2.5+dfsg-5ubuntu10.11
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.