CVE-2015-8620

Name: CVE-2015-8620
Creator: NVD / NIST
Published: 2016-04-13T14:59:03.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2015-8620 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.50%

39.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Avast	Avast Free Antivirus	<= 11.1.2245
Avast	Avast Internet Security	<= 11.1.2245
Avast	Avast Premier	<= 11.1.2245
Avast	Avast Pro Antivirus	<= 11.1.2245

References

http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2016/Feb/94Exploit, Mailing List, Third Party Advisory
http://www.securitytracker.com/id/1035093Third Party Advisory, VDB Entry
https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/Exploit
http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2016/Feb/94Exploit, Mailing List, Third Party Advisory
http://www.securitytracker.com/id/1035093Third Party Advisory, VDB Entry
https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/Exploit

Timeline

Published: Apr 13, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-8620?

How severe is CVE-2015-8620?

CVE-2015-8620 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2015-8620?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-8620?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST