Qemu: nbd: segmentation fault due to client non-negotiation
Published Jul 6, 2017
7.5
HIGHCVSS 3.1
EPSS 4.09%
Description
The qemu-nbd server in QEMU (aka Quick Emulator), when built with the Network Block Device (NBD) Server support, allows remote attackers to cause a denial of service (segmentation fault and server crash) by leveraging failure to ensure that all initialization occurs before talking to a client in the nbd_negotiate function.
Affected products
No data.
Configuration 2
- 9.0
No data.
RHEV 3.X Hypervisor and Agents for RHEL-7
qemu-kvm-rhev-10:2.6.0-28.el7_3.12
Fixed · RHSA-2017:1682
Red Hat Enterprise Linux 7
qemu-kvm-10:1.5.3-126.el7_3.10
Fixed · RHSA-2017:1681
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat OpenStack Platform 10.0 (Newton)
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat OpenStack Platform 11.0 (Ocata)
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat OpenStack Platform 8.0 (Liberty)
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat OpenStack Platform 9.0 (Mitaka)
qemu-kvm-rhev-10:2.9.0-10.el7
Fixed · RHSA-2017:2408
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
qemu-kvm-rhev-10:2.6.0-28.el7_3.12
Fixed · RHSA-2017:1682
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 OpenStack Platform 5 (Icehouse)
qemu-kvm-rhev
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| RHEV 3.X Hypervisor and Agents for RHEL-7 | qemu-kvm-rhev-10:2.6.0-28.el7_3.12 | Fixed | RHSA-2017:1682 |
| Red Hat Enterprise Linux 7 | qemu-kvm-10:1.5.3-126.el7_3.10 | Fixed | RHSA-2017:1681 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat OpenStack Platform 11.0 (Ocata) | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat OpenStack Platform 8.0 (Liberty) | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat OpenStack Platform 9.0 (Mitaka) | qemu-kvm-rhev-10:2.9.0-10.el7 | Fixed | RHSA-2017:2408 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | qemu-kvm-rhev-10:2.6.0-28.el7_3.12 | Fixed | RHSA-2017:1682 |
| 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 OpenStack Platform 5 (Icehouse) | 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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 (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.09% (0.04093) | 90.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.13% (0.04127) | 89.47th | v5 (v2026.06.15) |
| Apr 12, 2026 | 2.08% (0.02079) | 83.99th | v4 (v2025.03.14) |
| Dec 14, 2025 | 4.16% (0.04157) | 88.29th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.28% (0.05283) | 89.30th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.44% (0.02444) | 89.69th | v3 (v2023.03.01) |
| Jun 8, 2024 | 4.03% (0.04030) | 92.07th | v3 (v2023.03.01) |
| Apr 26, 2024 | 2.88% (0.02884) | 90.62th | v3 (v2023.03.01) |
| Sep 1, 2023 | 2.58% (0.02585) | 88.92th | v3 (v2023.03.01) |
| May 8, 2023 | 2.31% (0.02306) | 88.05th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.87% (0.02868) | 89.15th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.90% (0.02895) | 63.70th | v1 |
| Jan 6, 2022 | 2.90% (0.02895) | 63.35th | v1 |
| Sep 1, 2021 | 2.90% (0.02895) | 80.80th | v1 |
| Apr 14, 2021 | 2.90% (0.02895) | 0.00th | v1 |
References (12)
- http://www.debian.org/security/2017/dsa-3925 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2017/06/12/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/99011 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1681 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1682 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2408 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-9524 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1460170 Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg06240.html mailing-listx_refsource_MLISTPatchThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg02321.html mailing-listx_refsource_MLISTPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-9524
- https://www.cve.org/CVERecord?id=CVE-2017-9524
Change history (0)
No recorded changes yet.