Qemu: virtfs: local privilege escalation via virtfs-proxy-helper
Published Mar 24, 2017
10.0
CRITICALCVSS 3.0
EPSS 13.37%
Description
Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
Affected products
No data.
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 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
| 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 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 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5. This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, and the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7. This issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.
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:N/UI:N/S:C/C:H/I:H/A:H
AV:N/AC:L/Au:N/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 2, 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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 13.37% (0.13369) | 96.31th | v5 (v2026.06.15) |
| Sep 22, 2026 | 13.37% (0.13369) | 96.24th | v5 (v2026.06.15) |
| Sep 21, 2026 | 9.80% (0.09799) | 95.39th | v5 (v2026.06.15) |
| Sep 6, 2026 | 13.37% (0.13369) | 96.15th | v5 (v2026.06.15) |
| Sep 5, 2026 | 9.80% (0.09799) | 95.29th | v5 (v2026.06.15) |
| Aug 30, 2026 | 13.37% (0.13369) | 96.14th | v5 (v2026.06.15) |
| Aug 28, 2026 | 9.80% (0.09799) | 95.26th | v5 (v2026.06.15) |
| Aug 24, 2026 | 13.37% (0.13369) | 96.11th | v5 (v2026.06.15) |
| Aug 23, 2026 | 9.80% (0.09799) | 95.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.37% (0.13369) | 95.91th | v5 (v2026.06.15) |
| Mar 30, 2025 | 21.21% (0.21208) | 95.18th | v4 (v2025.03.14) |
| Mar 29, 2025 | 28.61% (0.28606) | 94.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.21% (0.21208) | 95.19th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.63% (0.01634) | 88.03th | v3 (v2023.03.01) |
| Jul 13, 2024 | 1.94% (0.01936) | 88.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.94% (0.01936) | 86.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.57% (0.07571) | 92.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.57% (0.07571) | 92.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.57% (0.07571) | 81.12th | v2 (v2022.01.01) |
References (7)
- http://packetstormsecurity.com/files/134948/Gentoo-QEMU-Local-Privilege-Escalation.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-8556 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1292211 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-8556
- https://security.gentoo.org/glsa/201602-01 vendor-advisoryx_refsource_GENTOOExploitThird Party AdvisoryVDB Entry
- https://www.cve.org/CVERecord?id=CVE-2015-8556
- https://www.exploit-db.com/exploits/39010/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/134948/Gentoo-QEMU-Local-Privilege-Escalation.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2015-8556 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1292211 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-8556 | ||
| https://security.gentoo.org/glsa/201602-01 | vendor-advisoryx_refsource_GENTOOExploitThird Party AdvisoryVDB Entry | |
| https://www.cve.org/CVERecord?id=CVE-2015-8556 | ||
| https://www.exploit-db.com/exploits/39010/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.