Qemu: qemu-nbd crashes due to undefined I/O coroutine
Published Jul 26, 2018
7.5
HIGHCVSS 3.0
EPSS 5.46%
Description
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
Affected products
-
- Version 2.10.1StatusaffectedConstraints-
- Version
Configuration 2
Configuration 3
- 3.0
Running on/with
- 7.0
No data.
RHEV 3.X Hypervisor and Agents for RHEL-7
qemu-kvm-rhev-10:2.9.0-16.el7_4.5
Fixed · RHSA-2017:2628
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3473
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3472
Red Hat OpenStack Platform 10.0 (Newton)
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3474
Red Hat OpenStack Platform 11.0 (Ocata)
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3466
Red Hat OpenStack Platform 8.0 (Liberty)
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3471
Red Hat OpenStack Platform 9.0 (Mitaka)
qemu-kvm-rhev-10:2.9.0-16.el7_4.11
Fixed · RHSA-2017:3470
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
qemu-kvm-rhev-10:2.9.0-16.el7_4.5
Fixed · RHSA-2017:2628
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 OpenStack Platform 12 (Pike)
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| RHEV 3.X Hypervisor and Agents for RHEL-7 | qemu-kvm-rhev-10:2.9.0-16.el7_4.5 | Fixed | RHSA-2017:2628 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3473 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3472 |
| Red Hat OpenStack Platform 10.0 (Newton) | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3474 |
| Red Hat OpenStack Platform 11.0 (Ocata) | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3466 |
| Red Hat OpenStack Platform 8.0 (Liberty) | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3471 |
| Red Hat OpenStack Platform 9.0 (Mitaka) | qemu-kvm-rhev-10:2.9.0-16.el7_4.11 | Fixed | RHSA-2017:3470 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | qemu-kvm-rhev-10:2.9.0-16.el7_4.5 | Fixed | RHSA-2017:2628 |
| 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 OpenStack Platform 12 (Pike) | 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: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 (30 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.46% (0.05459) | 92.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.53% (0.05529) | 91.78th | v5 (v2026.06.15) |
| May 24, 2026 | 2.97% (0.02967) | 86.67th | v4 (v2025.03.14) |
| Nov 21, 2025 | 1.79% (0.01786) | 82.15th | v4 (v2025.03.14) |
| Nov 18, 2025 | 5.30% (0.05305) | 89.02th | v4 (v2025.03.14) |
| May 30, 2025 | 1.81% (0.01815) | 81.94th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.12% (0.03115) | 77.94th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.93% (0.01930) | 82.17th | v4 (v2025.03.14) |
| Feb 26, 2025 | 2.62% (0.02619) | 90.24th | v3 (v2023.03.01) |
| Jan 19, 2025 | 3.97% (0.03967) | 91.98th | v3 (v2023.03.01) |
| Dec 17, 2024 | 2.62% (0.02619) | 90.01th | v3 (v2023.03.01) |
| Aug 10, 2024 | 11.42% (0.11418) | 95.30th | v3 (v2023.03.01) |
| Jul 5, 2024 | 8.40% (0.08399) | 94.47th | v3 (v2023.03.01) |
| Mar 14, 2024 | 6.11% (0.06111) | 93.35th | v3 (v2023.03.01) |
| Jan 26, 2024 | 7.80% (0.07795) | 93.61th | v3 (v2023.03.01) |
| Dec 17, 2023 | 6.90% (0.06902) | 93.22th | v3 (v2023.03.01) |
| Sep 30, 2023 | 7.16% (0.07159) | 93.21th | v3 (v2023.03.01) |
| Jul 20, 2023 | 5.18% (0.05185) | 91.97th | v3 (v2023.03.01) |
| Jun 1, 2023 | 4.24% (0.04240) | 91.01th | v3 (v2023.03.01) |
| May 8, 2023 | 3.04% (0.03037) | 89.47th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.10% (0.04104) | 90.81th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Feb 13, 2023 | 2.17% (0.02172) | 80.28th | v2 (v2022.01.01) |
| Feb 3, 2023 | 3.78% (0.03779) | 85.12th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.14% (0.04139) | 74.02th | v1 |
| Jan 6, 2022 | 4.14% (0.04139) | 73.79th | v1 |
| Sep 1, 2021 | 4.14% (0.04139) | 83.38th | v1 |
| Apr 14, 2021 | 4.14% (0.04139) | 0.00th | v1 |
References (16)
- http://www.openwall.com/lists/oss-security/2017/07/21/4 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.securityfocus.com/bid/99944 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2628 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3466 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3470 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3471 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3472 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3473 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3474 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-7539 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1473622 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b x_refsource_CONFIRM
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=ff82911cd3f69f028f2537825c9720ff78bc3f19 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2017-7539
- https://www.cve.org/CVERecord?id=CVE-2017-7539
Change history (0)
No recorded changes yet.