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CVE-2016-7908

4.4 · MEDIUM

The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators…

Published Oct 5, 2016CWE-835EPSS 0.43%

Overview

CVE-2016-7908 is a medium-severity vulnerability. It was published on October 5, 2016 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444d6e087aReflists.opensuse.org/opensuse-updates/2016-12/msg00140.htmlRefwww.openwall.com/lists/oss-security/2016/10/03/2Refwww.openwall.com/lists/oss-security/2016/10/03/5Refwww.securityfocus.com/bid/93273Reflists.debian.org/debian-lts-announce/2018/11/msg00038.htmlReflists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.htmlRefsecurity.gentoo.org/glsa/201611-11Refgit.qemu.org/?p=qemu.git%3Ba=commit%3Bh=070c4b92b8cd5390889716677a0b92444d6e087aReflists.opensuse.org/opensuse-updates/2016-12/msg00140.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-7908?

CVE-2016-7908 is a medium-severity vulnerability. It was published on October 5, 2016 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2016-7908?

This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2016-7908?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-7908?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-7908 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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