Security readout for executives and security teams
This flaw lets an unauthenticated client crash a vulnerable qemu-nbd server during early NBD connection setup. It is a denial-of-service issue, not a data theft or code execution issue based on the provided sources. Business impact is highest where QEMU NBD services support production virtualization, backup, or disk-image workflows. Exposure is most likely on systems running vulnerable QEMU qemu-nbd services, especially where NBD is reachable from untrusted networks or shared infrastructure. Hosts with QEMU installed but no qemu-nbd service exposed have materially lower exposure. Treat as a targeted availability risk. Prioritize remediation on production virtualization, image-serving, backup, or automation hosts where qemu-nbd is network reachable. Lower priority is reasonable for isolated systems without exposed qemu-nbd services. Mitigation focus: Apply vendor QEMU updates, including relevant Red Hat advisories where applicable.; Upgrade QEMU/qemu-nbd to a version containing the upstream fix.; Restrict NBD/qemu-nbd access to trusted hosts only..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-617: Exact CWE lookup
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Open ATT&CK lookupCVE-2017-7539 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2017:2628CVE reference · vendor-advisory, x_refsource_REDHAT
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=2b0bbc4f8809c972bad134bc1a2570dbb01dea0bCVE reference · x_refsource_CONFIRM
- RHSA-2017:3473CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3470CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3472CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3474CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2017:3471CVE reference · vendor-advisory, x_refsource_REDHAT
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=ff82911cd3f69f028f2537825c9720ff78bc3f19CVE reference · x_refsource_CONFIRM
- RHSA-2017:3466CVE reference · vendor-advisory, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Reachable Assertion
Reachable Assertion represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.