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CRITICAL

CVE-2017-15118

CVSS v3

9.8

CRITICAL

EPSS Score

11.9 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2017-15118 Red Hat Product Security46 products fixed · 5 known affected

    Qemu: stack buffer overflow in NBD server triggered via long export name

    qemu-img-ma as a component of Red Hat Enterprise Linux 7 · qemu-kvm-common-ma as a component of Red Hat Enterprise Linux 7 · qemu-kvm-ma as a component of Red Hat Enterprise Linux 7

  • RHSA-2018:1113 Red Hat Product Security35 products fixed

    Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

  • RHSA-2018:1104 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update

Full record on NVD

Description

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

Technical details

Published
2018-07-27
Exploit-DB
EDB-43194

Frequently asked questions

What is CVE-2017-15118?

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

Is CVE-2017-15118 actively exploited?

Active exploitation of CVE-2017-15118 has not been confirmed. Its EPSS score was 11.9% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-15118?

CVE-2017-15118 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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