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Bug 621292 (CVE-2017-9524) - <app-emulation/qemu-2.9.0-r55: nbd: segmentation fault due to client non-negotiation
Summary: <app-emulation/qemu-2.9.0-r55: nbd: segmentation fault due to client non-nego...
Alias: CVE-2017-9524
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [noglsa cve]
Depends on: CVE-2017-11434
  Show dependency tree
Reported: 2017-06-09 14:08 UTC by Agostino Sarubbo
Modified: 2017-09-03 22:50 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2017-06-09 14:08:34 UTC
From ${URL} :

Quick Emulator(Qemu) built with the Network Block Device(NBD) Server support
is vulnerable to a null pointer dereference issue. It could occur while
releasing a client, which was not initialised due to failed negotiation.

A remote user/process could use this flaw to crash the qemu-nbd server
resulting in DoS.

Upstream patch:

@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 1 Volkan 2017-06-30 19:09:06 UTC
CVE number is CVE-2017-9524
Comment 2 Matthias Maier gentoo-dev 2017-07-26 17:16:39 UTC
commit e67f10960bca69fdede54d77eb54c4ab72b98d08
Author: Matthias Maier <>
Date:   Wed Jul 26 12:10:46 2017 -0500

    app-emulation/qemu: security fixes
      CVE-2017-11334, bug #621292
      CVE-2017-11434, bug #625614
      CVE-2017-9503, bug #621184
      CVE-2017-9524, bug #621292
    Package-Manager: Portage-2.3.6, Repoman-2.3.3