CVE-2017-2630

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-07-27 · updated 2026-06-17
Weakness: CWE-121

Description

A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network Block Device (NBD) client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.

Affected products

QEMU: before 2.9 — fixed in 2.9

How to fix

Upgrade to a fixed version: QEMU 2.9. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2017/02/15/2
http://www.securityfocus.com/bid/96265
https://access.redhat.com/errata/RHSA-2017:2392
https://bugzilla.redhat.com/show_bug.cgi?id=1422415
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2630
https://github.com/qemu/qemu/commit/2563c9c6b8670400c48e562034b321a7cf3d9a85
https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg01246.html
https://security.gentoo.org/glsa/201704-01
http://www.openwall.com/lists/oss-security/2017/02/15/2
http://www.securityfocus.com/bid/96265
https://access.redhat.com/errata/RHSA-2017:2392
https://bugzilla.redhat.com/show_bug.cgi?id=1422415

Get alerted when CVE-2017-2630 or the next vulnerability affects your stack