Out-of-bounds write in qemu (Alpine package)

Published: 2020-09-11
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-14364
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
qemu (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Out-of-bounds write

Risk: Medium

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-14364

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: Yes


The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error within the USB emulator in QEMU. A remote user with access to guest operating system on the guest operating system can send specially crafted USB packets, trigger out-of-bounds write and execute arbitrary code on the host system.


Install update from vendor's website.

Vulnerable software versions

qemu (Alpine package): 4.0.1-r0, 4.2.0-r0, 4.2.0-r1, 4.2.0-r2, 5.1.0-r0

CPE External links


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.