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Fencer Vulns
high 7.5

CVE-2017-9524 json

The qemu-nbd server in QEMU (aka Quick Emulator), when built with the Network Block Device (NBD) Server support, allows remote attackers to…

published 2017-07-06 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-18455

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.1%
EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

The qemu-nbd server in QEMU (aka Quick Emulator), when built with the Network Block Device (NBD) Server support, allows remote attackers to cause a denial of service (segmentation fault and server crash) by leveraging failure to ensure that all initialization occurs before talking to a client in the nbd_negotiate function.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:2.8+dfsg-7

debian advisories DEBIAN-CVE-2017-9524

  • qemu-kvm-rhev openstack 11, openstack 10, openstack 9 +3 more 10:2.9.0-10.el7
  • qemu-img-rhev openstack 11, openstack 10, openstack 9 +3 more 10:2.9.0-10.el7
  • qemu-kvm-tools-rhev openstack 11, openstack 10, openstack 9 +3 more 10:2.9.0-10.el7
  • qemu-kvm-common-rhev openstack 11, openstack 10, openstack 9 +3 more 10:2.9.0-10.el7
  • qemu-kvm RHEL 7 10:1.5.3-126.el7_3.10
  • qemu-img RHEL 7 10:1.5.3-126.el7_3.10
  • qemu-kvm-tools RHEL 7 10:1.5.3-126.el7_3.10
  • qemu-kvm-common RHEL 7 10:1.5.3-126.el7_3.10

red hat advisories RHSA-2017:2408RHSA-2017:1681RHSA-2017:1682

  • qemu SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.6.2-41.22.2

suse advisories SUSE-SU-2017:2936-1

  • qemu openSUSE Tumbleweed 6.1.0-32.1

opensuse advisories openSUSE-SU-2024:11287-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-9524 updated cvss 5.3

Qemu: nbd: segmentation fault due to client non-negotiation

  • Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) qemu-kvm-rhev
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) qemu-img 1.5.3-126.el7_3.10, qemu-kvm 1.5.3-126.el7_3.10, qemu-kvm-tools 1.5.3-126.el7_3.10, qemu-kvm-common 1.5.3-126.el7_3.10 Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img 1.5.3-126.el7_3.10, qemu-kvm 1.5.3-126.el7_3.10, qemu-kvm-tools 1.5.3-126.el7_3.10, qemu-kvm-common 1.5.3-126.el7_3.10
    fixed: vendor fix RHSA-2017:1681
  • Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7 Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7
    fixed: vendor fix RHSA-2017:2408
  • Red Hat Enterprise Linux Server (v. 7) qemu-img 1.5.3-126.el7_3.10, qemu-kvm 1.5.3-126.el7_3.10, qemu-kvm-tools 1.5.3-126.el7_3.10, qemu-kvm-common 1.5.3-126.el7_3.10 Red Hat Enterprise Linux Workstation (v. 7) qemu-img 1.5.3-126.el7_3.10, qemu-kvm 1.5.3-126.el7_3.10, qemu-kvm-tools 1.5.3-126.el7_3.10, qemu-kvm-common 1.5.3-126.el7_3.10
    fixed: vendor fix RHSA-2017:1681
  • Red Hat OpenStack Platform 8.0 (Liberty) qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7 Red Hat OpenStack Platform 9.0 qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7 Red Hat OpenStack Platform 10.0 qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7 Red Hat OpenStack Platform 11.0 qemu-img-rhev 2.9.0-10.el7, qemu-kvm-rhev 2.9.0-10.el7, qemu-kvm-tools-rhev 2.9.0-10.el7, qemu-kvm-common-rhev 2.9.0-10.el7
    fixed: vendor fix RHSA-2017:2408
  • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev 2.6.0-28.el7_3.12, qemu-kvm-rhev 2.6.0-28.el7_3.12, qemu-kvm-tools-rhev 2.6.0-28.el7_3.12, qemu-kvm-common-rhev 2.6.0-28.el7_3.12 Red Hat RHEV-H and VDSM for 7 Hosts qemu-img-rhev 2.6.0-28.el7_3.12, qemu-kvm-rhev 2.6.0-28.el7_3.12, qemu-kvm-tools-rhev 2.6.0-28.el7_3.12, qemu-kvm-common-rhev 2.6.0-28.el7_3.12
    fixed: vendor fix RHSA-2017:1682
  • Red Hat Enterprise Linux 5 kvm, xen Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.09% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.