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
Published Apr 13, 2016
7.8
HIGHCVSS 3.1
EPSS 0.50%
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.
Affected products
No data.
- ≤ 11.1.2245
- ≤ 11.1.2245
- ≤ 11.1.2245
- ≤ 11.1.2245
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.50% (0.00503) | 40.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00503) | 38.79th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.16% (0.00157) | 33.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00075) | 34.46th | v3 (v2023.03.01) |
| May 1, 2024 | 0.04% (0.00045) | 14.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (4)
- http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2016/Feb/94 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://www.securitytracker.com/id/1035093 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/ x_refsource_MISCExploit
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| http://seclists.org/fulldisclosure/2016/Feb/94 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://www.securitytracker.com/id/1035093 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/ | x_refsource_MISCExploit |
Change history (0)
No recorded changes yet.