QEMU: cirrus: OOB access when updating VGA display
Published Mar 12, 2018
5.5
MEDIUMCVSS 3.1
EPSS 0.61%
Description
Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.
Affected products
No data.
Configuration 3
- 6.0
- 7.0
- 6.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 6.0
- 7.0
Configuration 4
- 14.04
- 16.04
- 18.04
- 18.10
No data.
Red Hat Enterprise Linux 6
qemu-kvm-2:0.12.1.2-2.506.el6_10.1
Fixed · RHSA-2018:2162
Red Hat Enterprise Linux 7
qemu-kvm-10:1.5.3-156.el7_5.1
Fixed · RHSA-2018:1416
Red Hat OpenStack Platform 10.0 (Newton)
qemu-kvm-rhev-10:2.10.0-21.el7_5.3
Fixed · RHSA-2018:1644
Red Hat OpenStack Platform 12.0 (Pike)
qemu-kvm-rhev-10:2.10.0-21.el7_5.3
Fixed · RHSA-2018:1643
Red Hat OpenStack Platform 8.0 (Liberty)
qemu-kvm-rhev-10:2.10.0-21.el7_5.3
Fixed · RHSA-2018:1646
Red Hat OpenStack Platform 9.0 (Mitaka)
qemu-kvm-rhev-10:2.10.0-21.el7_5.3
Fixed · RHSA-2018:1645
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
qemu-kvm-rhev-10:2.10.0-21.el7_5.2
Fixed · RHSA-2018:1369
Red Hat Enterprise Linux 5
kvm
Will not fix
Red Hat Enterprise Linux 5
xen
Will not fix
Red Hat Enterprise Linux 7
qemu-kvm-ma
Not affected
Red Hat Enterprise Linux 8
qemu-kvm
Not affected
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
qemu-kvm-rhev
Will not fix
Red Hat OpenStack Platform 11 (Ocata)
qemu-kvm-rhev
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm-2:0.12.1.2-2.506.el6_10.1 | Fixed | RHSA-2018:2162 |
| Red Hat Enterprise Linux 7 | qemu-kvm-10:1.5.3-156.el7_5.1 | Fixed | RHSA-2018:1416 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev-10:2.10.0-21.el7_5.3 | Fixed | RHSA-2018:1644 |
| Red Hat OpenStack Platform 12.0 (Pike) | qemu-kvm-rhev-10:2.10.0-21.el7_5.3 | Fixed | RHSA-2018:1643 |
| Red Hat OpenStack Platform 8.0 (Liberty) | qemu-kvm-rhev-10:2.10.0-21.el7_5.3 | Fixed | RHSA-2018:1646 |
| Red Hat OpenStack Platform 9.0 (Mitaka) | qemu-kvm-rhev-10:2.10.0-21.el7_5.3 | Fixed | RHSA-2018:1645 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | qemu-kvm-rhev-10:2.10.0-21.el7_5.2 | Fixed | RHSA-2018:1369 |
| Red Hat Enterprise Linux 5 | kvm | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | xen | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | n/a |
| Red Hat Enterprise Linux 8 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | qemu-kvm-rhev | Will not fix | n/a |
| Red Hat OpenStack Platform 11 (Ocata) | qemu-kvm-rhev | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
AV:L/AC:L/Au:N/C:N/I:N/A:P
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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.61% (0.00610) | 47.27th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.64% (0.00637) | 45.54th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.08% (0.00080) | 21.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.57% (0.02567) | 55.02th | v1 |
| Jan 6, 2022 | 2.57% (0.02567) | 54.58th | v1 |
| Sep 1, 2021 | 2.57% (0.02567) | 78.88th | v1 |
| Apr 14, 2021 | 2.57% (0.02567) | 0.00th | v1 |
References (12)
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html vendor-advisoryx_refsource_SUSEMailing ListRelease NotesThird Party Advisory
- http://www.openwall.com/lists/oss-security/2018/03/09/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/103350 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:1369 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1416 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2162 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-7858 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1553402 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html mailing-listx_refsource_MLISTMailing ListPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-7858
- https://usn.ubuntu.com/3649-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-7858
Change history (0)
No recorded changes yet.