QEMU: I/O: potential memory exhaustion via websock connection to VNC
Published Oct 12, 2017
7.5
HIGHCVSS 3.0
EPSS 4.27%
Description
Qemu through 2.10.0 allows remote attackers to cause a memory leak by triggering slow data-channel read operations, related to io/channel-websock.c.
Affected products
No data.
No data.
Red Hat Enterprise Linux 7
qemu-kvm-10:1.5.3-156.el7
Fixed · RHSA-2018:0816
Red Hat OpenStack Platform 10.0 (Newton)
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1113
Red Hat OpenStack Platform 11.0 (Ocata)
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1113
Red Hat OpenStack Platform 12.0 (Pike)
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1113
Red Hat OpenStack Platform 8.0 (Liberty)
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1113
Red Hat OpenStack Platform 9.0 (Mitaka)
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1113
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
qemu-kvm-rhev-10:2.10.0-21.el7
Fixed · RHSA-2018:1104
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 6
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-ma
Affected
Red Hat Enterprise Linux 7
qemu-kvm-rhev
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 7 | qemu-kvm-10:1.5.3-156.el7 | Fixed | RHSA-2018:0816 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1113 |
| Red Hat OpenStack Platform 11.0 (Ocata) | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1113 |
| Red Hat OpenStack Platform 12.0 (Pike) | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1113 |
| Red Hat OpenStack Platform 8.0 (Liberty) | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1113 |
| Red Hat OpenStack Platform 9.0 (Mitaka) | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1113 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | qemu-kvm-rhev-10:2.10.0-21.el7 | Fixed | RHSA-2018:1104 |
| 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 6 | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | 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
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:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L
AV:N/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 (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.27% (0.04272) | 90.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.27% (0.04272) | 89.78th | v5 (v2026.06.15) |
| Apr 12, 2026 | 2.03% (0.02031) | 83.80th | v4 (v2025.03.14) |
| Apr 2, 2026 | 3.45% (0.03448) | 87.46th | v4 (v2025.03.14) |
| Dec 9, 2025 | 2.39% (0.02390) | 84.52th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.78% (0.00781) | 71.45th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.17% (0.02168) | 73.83th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.78% (0.00781) | 72.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.71% (0.00710) | 81.10th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.71% (0.00710) | 79.83th | v3 (v2023.03.01) |
| May 8, 2023 | 0.71% (0.00710) | 77.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.76% (0.01763) | 86.03th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.21% (0.02207) | 50.62th | v1 |
| Jan 6, 2022 | 2.21% (0.02207) | 50.12th | v1 |
| Sep 1, 2021 | 2.21% (0.02207) | 77.52th | v1 |
| Apr 14, 2021 | 2.21% (0.02207) | 0.00th | v1 |
References (11)
- http://www.securityfocus.com/bid/101277 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0816 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2018:1104 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-15268 Vendor Advisory
- https://bugs.launchpad.net/qemu/+bug/1718964 x_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1496879 Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg02278.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-15268
- https://usn.ubuntu.com/3575-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2017-15268
- https://www.debian.org/security/2018/dsa-4213 vendor-advisoryx_refsource_DEBIAN
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101277 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHSA-2018:0816 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2018:1104 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2017-15268 | Vendor Advisory | |
| https://bugs.launchpad.net/qemu/+bug/1718964 | x_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1496879 | Issue Tracking | |
| https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg02278.html | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-15268 | ||
| https://usn.ubuntu.com/3575-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://www.cve.org/CVERecord?id=CVE-2017-15268 | ||
| https://www.debian.org/security/2018/dsa-4213 | vendor-advisoryx_refsource_DEBIAN |
Change history (0)
No recorded changes yet.