CVE-2020-3668 [Critical] | Memory Corruption in Ipq6018 Firmware

u'Buffer overflow while parsing PMF enabled MCBC frames due to frame length being lesser than what is expected while parsing' in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking in IPQ6018, IPQ8074, Kamorta, Nicobar, QCA6390, QCA8081, QCN7605, QCS404, QCS405, QCS605, Rennell, SA415M, SC7180, SC8180X, SDA845, SDM670, SDM710, SDM845, SDM850, SM6150, SM7150, SM8150, SXR1130

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.43%	1.05%	+0.62%
2	2026-05-23	0.45%	0.43%	-0.03%
3	2025-11-21	—	0.45%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.43%

1.05%

+0.62%

2026-05-23

0.45%

0.43%

-0.03%

2025-11-21

—

0.45%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
10.0	2.0	HIGH	`AV:N/AC:L/Au:N/C:C/I:C/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	10.0	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

10.0

2.0

HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:C): Complete confidentiality impact.
Integrity impact (I:C): Complete integrity impact.
Availability impact (A:C): Complete availability impact.

10.0

[email protected]

Affected software / configurations for CVE-2020-3668

Vendor	Product	Version	Raw CPE
qualcomm	ipq6018_firmware	—	cpe:2.3:o:qualcomm:ipq6018_firmware:-:::::::*
qualcomm	ipq8074_firmware	—	cpe:2.3:o:qualcomm:ipq8074_firmware:-:::::::*
qualcomm	kamorta_firmware	—	cpe:2.3:o:qualcomm:kamorta_firmware:-:::::::*
qualcomm	nicobar_firmware	—	cpe:2.3:o:qualcomm:nicobar_firmware:-:::::::*
qualcomm	qca6390_firmware	—	cpe:2.3:o:qualcomm:qca6390_firmware:-:::::::*
qualcomm	qca8081_firmware	—	cpe:2.3:o:qualcomm:qca8081_firmware:-:::::::*
qualcomm	qcn7605_firmware	—	cpe:2.3:o:qualcomm:qcn7605_firmware:-:::::::*
qualcomm	qcs404_firmware	—	cpe:2.3:o:qualcomm:qcs404_firmware:-:::::::*
qualcomm	qcs405_firmware	—	cpe:2.3:o:qualcomm:qcs405_firmware:-:::::::*
qualcomm	qcs605_firmware	—	cpe:2.3:o:qualcomm:qcs605_firmware:-:::::::*
qualcomm	rennell_firmware	—	cpe:2.3:o:qualcomm:rennell_firmware:-:::::::*
qualcomm	sa415m_firmware	—	cpe:2.3:o:qualcomm:sa415m_firmware:-:::::::*
qualcomm	sc7180_firmware	—	cpe:2.3:o:qualcomm:sc7180_firmware:-:::::::*
qualcomm	sc8180x_firmware	—	cpe:2.3:o:qualcomm:sc8180x_firmware:-:::::::*
qualcomm	sda845_firmware	—	cpe:2.3:o:qualcomm:sda845_firmware:-:::::::*
qualcomm	sdm670_firmware	—	cpe:2.3:o:qualcomm:sdm670_firmware:-:::::::*
qualcomm	sdm710_firmware	—	cpe:2.3:o:qualcomm:sdm710_firmware:-:::::::*
qualcomm	sdm845_firmware	—	cpe:2.3:o:qualcomm:sdm845_firmware:-:::::::*
qualcomm	sdm850_firmware	—	cpe:2.3:o:qualcomm:sdm850_firmware:-:::::::*
qualcomm	sm6150_firmware	—	cpe:2.3:o:qualcomm:sm6150_firmware:-:::::::*
qualcomm	sm7150_firmware	—	cpe:2.3:o:qualcomm:sm7150_firmware:-:::::::*
qualcomm	sm8150_firmware	—	cpe:2.3:o:qualcomm:sm8150_firmware:-:::::::*
qualcomm	sxr1130_firmware	—	cpe:2.3:o:qualcomm:sxr1130_firmware:-:::::::*

References for CVE-2020-3668

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/august-2020-bulletin	Broken Link Vendor Advisory

URL

CVE-2020-3668

Exploit prediction scoring system (EPSS) score for CVE-2020-3668

Common vulnerability scoring system (CVSS) metrics for CVE-2020-3668

Weakness enumeration for CVE-2020-3668

Affected software / configurations for CVE-2020-3668

References for CVE-2020-3668