CVE-2016-7909

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-10-05 · updated 2026-06-17
Weakness: CWE-835

Description

The pcnet_rdra_addr function in hw/net/pcnet.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by setting the (1) receive or (2) transmit descriptor ring length to 0.

Affected products

Debian Linux: 8.0
QEMU: through 2.7.1

References

http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
http://www.openwall.com/lists/oss-security/2016/10/03/3
http://www.openwall.com/lists/oss-security/2016/10/03/6
http://www.securityfocus.com/bid/93275
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07942.html
https://security.gentoo.org/glsa/201611-11
http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
http://www.openwall.com/lists/oss-security/2016/10/03/3
http://www.openwall.com/lists/oss-security/2016/10/03/6
http://www.securityfocus.com/bid/93275
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

Get alerted when CVE-2016-7909 or the next vulnerability affects your stack