CVE-2016-2391

Severity: medium (CVSS 5.0 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: 2016-06-16 · updated 2026-06-17
Weakness: CWE-476

Description

The ohci_bus_start function in the USB OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) via vectors related to multiple eof_timers.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Debian Linux: 8.0
QEMU: through 2.5.1.1

References

http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=fa1298c2d623522eda7b4f1f721fcb935abb7360
http://www.openwall.com/lists/oss-security/2016/02/16/2
http://www.securityfocus.com/bid/83263
http://www.ubuntu.com/usn/USN-2974-1
https://bugzilla.redhat.com/show_bug.cgi?id=1304794
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg03374.html
http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=fa1298c2d623522eda7b4f1f721fcb935abb7360
http://www.openwall.com/lists/oss-security/2016/02/16/2
http://www.securityfocus.com/bid/83263
http://www.ubuntu.com/usn/USN-2974-1
https://bugzilla.redhat.com/show_bug.cgi?id=1304794

Get alerted when CVE-2016-2391 or the next vulnerability affects your stack