Qemu: 9p: virtfs allows guest to access host filesystem
Published Apr 26, 2018
8.8
HIGHCVSS 3.0
EPSS 3.72%
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 and potentially escalating their privileges on a host.
Affected products
- Vendor n/a Product QEMU Defaultn/a
- Version qemu 2.9StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | QEMU | n/a |
|
Configuration 2
- 8.0
No data.
Red Hat Enterprise Linux 5
kvm
Not affected
Red Hat Enterprise Linux 5
xen
Not affected
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux 8
qemu-kvm
Not affected
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 10 (Newton)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 8 (Liberty)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
| Red Hat Enterprise Linux 5 | xen | Not affected | n/a |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux 8 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | qemu-kvm-rhev | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
AV:N/AC:L/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.72% (0.03719) | 89.44th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.84% (0.03844) | 88.73th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.15% (0.01151) | 76.56th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.43% (0.04426) | 81.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.00% (0.00996) | 75.38th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00209) | 59.77th | v3 (v2023.03.01) |
| Nov 20, 2023 | 0.21% (0.00209) | 58.71th | v3 (v2023.03.01) |
| Oct 27, 2023 | 0.27% (0.00266) | 63.97th | v3 (v2023.03.01) |
| Sep 17, 2023 | 0.38% (0.00378) | 69.60th | v3 (v2023.03.01) |
| Apr 20, 2023 | 0.37% (0.00372) | 68.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00363) | 67.97th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
References (12)
- http://www.openwall.com/lists/oss-security/2017/01/17/12 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/95461 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037604 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-9602 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1413929 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9602 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2017-01/msg06225.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04347.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-9602
- https://security.gentoo.org/glsa/201704-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9602
Change history (0)
No recorded changes yet.