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CVE-2017-7539

26
FAUCET Score

CVE-2017-7539 describes an assertion-failure flaw in the QEMU Network Block Device (NBD) server, affecting various QEMU and Red Hat products. This vulnerability allows a remote attacker to crash the qemu-nbd server by sending unexpected data during connection negotiation, leading to a denial of service. With a CVSS score of 7.5 (High), it is easily exploitable over the network with low attack complexity and no user interaction required. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.10.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
8CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.53%
Probability of exploitation in next 30 days
EPSS Percentile
92.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0553 is in the 86th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 11.0 (Ocata)Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 8.0 (Liberty)Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 9.0 (Mitaka)Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.5
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-7Fixed in: qemu-kvm-rhev-10:2.9.0-16.el7_4.5
View patch

Vendor Advisories (1)

redhatCVE-2017-7539Moderate

Qemu: qemu-nbd crashes due to undefined I/O coroutine

Jun 2, 2017

References

access.redhat.com / errata/RHSA-2017:2628
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3466
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3470
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3471
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3472
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3473
Third Party Advisory
access.redhat.com / errata/RHSA-2017:3474
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
git.qemu.org
git.qemu.org
openwall.com / lists/oss-security/2017/07/21/4
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/99944
Third Party AdvisoryVDB Entry