No exploitation reportedFix available

CVE-2017-7539

Q: Is CVE-2017-7539 actively exploited?

Active exploitation of CVE-2017-7539 has not been confirmed. Its EPSS score was 5.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-7539?

CVE-2017-7539 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2018-07-26
WeaknessCWE-20 · CWE-617

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2018-07-2614:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7539?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7539?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Redhat openstack

Branch	Affected	Fixed in	Source
6.0	= 6.0	no fix published	NVD
7.0	= 7.0	no fix published	NVD
8.x	= 8	no fix published	NVD
9.x	= 9	no fix published	NVD
10.x	= 10	no fix published	NVD
11.x	= 11	no fix published	NVD

Redhat virtualizationversion to verify

Branch	Affected	Fixed in	Source
4.0	= 4.0	no fix published	NVD
3.0	= 3.0	no fix published	NVD

Qemu

Branch	Affected	Fixed in	Source
2.10	< 2.10.1	2.10.1	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.openwall.comPatch
bugzilla.redhat.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.05.3read 2026-10-23
NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-617read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score5.5 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-07-26
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-7539?

Is CVE-2017-7539 actively exploited?

Active exploitation of CVE-2017-7539 has not been confirmed. Its EPSS score was 5.5% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-7539?

CVE-2017-7539 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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