CVE-2021-1949 [High] | Integer Overflow in Apq8009 Firmware

Possible integer overflow due to improper check of batch count value while sanitizer is enabled in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.10%	0.16%	+0.06%
2	2025-11-21	0.03%	0.10%	+0.06%
3	2025-11-18	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.10%

0.16%

+0.06%

2025-11-21

0.03%

0.10%

+0.06%

2025-11-18

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.4	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. 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.	2.5	5.9	[email protected]
7.2	2.0	HIGH	`AV:L/AC:L/Au:N/C:C/I:C/A:C` Click to expand Access vector (AV:L) Requires local access to the target system. 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.	3.9	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.4

3.1

HIGH

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

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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.

2.5

5.9

[email protected]

7.2

2.0

HIGH

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

Access vector (AV:L): Requires local access to the target system.
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.

3.9

10.0

[email protected]

Affected software / configurations for CVE-2021-1949

Vendor	Product	Version	Raw CPE
qualcomm	apq8009_firmware	—	cpe:2.3:o:qualcomm:apq8009_firmware:-:::::::*
qualcomm	apq8009w_firmware	—	cpe:2.3:o:qualcomm:apq8009w_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	apq8053_firmware	—	cpe:2.3:o:qualcomm:apq8053_firmware:-:::::::*
qualcomm	apq8064au_firmware	—	cpe:2.3:o:qualcomm:apq8064au_firmware:-:::::::*
qualcomm	apq8096au_firmware	—	cpe:2.3:o:qualcomm:apq8096au_firmware:-:::::::*
qualcomm	aqt1000_firmware	—	cpe:2.3:o:qualcomm:aqt1000_firmware:-:::::::*
qualcomm	ar8031_firmware	—	cpe:2.3:o:qualcomm:ar8031_firmware:-:::::::*
qualcomm	csra6620_firmware	—	cpe:2.3:o:qualcomm:csra6620_firmware:-:::::::*
qualcomm	csra6640_firmware	—	cpe:2.3:o:qualcomm:csra6640_firmware:-:::::::*
qualcomm	fsm10055_firmware	—	cpe:2.3:o:qualcomm:fsm10055_firmware:-:::::::*
qualcomm	fsm10056_firmware	—	cpe:2.3:o:qualcomm:fsm10056_firmware:-:::::::*
qualcomm	mdm9206_firmware	—	cpe:2.3:o:qualcomm:mdm9206_firmware:-:::::::*
qualcomm	mdm9250_firmware	—	cpe:2.3:o:qualcomm:mdm9250_firmware:-:::::::*
qualcomm	mdm9607_firmware	—	cpe:2.3:o:qualcomm:mdm9607_firmware:-:::::::*
qualcomm	mdm9626_firmware	—	cpe:2.3:o:qualcomm:mdm9626_firmware:-:::::::*
qualcomm	mdm9628_firmware	—	cpe:2.3:o:qualcomm:mdm9628_firmware:-:::::::*
qualcomm	mdm9650_firmware	—	cpe:2.3:o:qualcomm:mdm9650_firmware:-:::::::*
qualcomm	msm8909w_firmware	—	cpe:2.3:o:qualcomm:msm8909w_firmware:-:::::::*
qualcomm	msm8917_firmware	—	cpe:2.3:o:qualcomm:msm8917_firmware:-:::::::*
qualcomm	msm8953_firmware	—	cpe:2.3:o:qualcomm:msm8953_firmware:-:::::::*
qualcomm	msm8996au_firmware	—	cpe:2.3:o:qualcomm:msm8996au_firmware:-:::::::*
qualcomm	qca4020_firmware	—	cpe:2.3:o:qualcomm:qca4020_firmware:-:::::::*
qualcomm	qca6174a_firmware	—	cpe:2.3:o:qualcomm:qca6174a_firmware:-:::::::*
qualcomm	qca6310_firmware	—	cpe:2.3:o:qualcomm:qca6310_firmware:-:::::::*
qualcomm	qca6320_firmware	—	cpe:2.3:o:qualcomm:qca6320_firmware:-:::::::*
qualcomm	qca6335_firmware	—	cpe:2.3:o:qualcomm:qca6335_firmware:-:::::::*
qualcomm	qca6390_firmware	—	cpe:2.3:o:qualcomm:qca6390_firmware:-:::::::*
qualcomm	qca6391_firmware	—	cpe:2.3:o:qualcomm:qca6391_firmware:-:::::::*
qualcomm	qca6420_firmware	—	cpe:2.3:o:qualcomm:qca6420_firmware:-:::::::*
qualcomm	qca6421_firmware	—	cpe:2.3:o:qualcomm:qca6421_firmware:-:::::::*
qualcomm	qca6426_firmware	—	cpe:2.3:o:qualcomm:qca6426_firmware:-:::::::*
qualcomm	qca6430_firmware	—	cpe:2.3:o:qualcomm:qca6430_firmware:-:::::::*
qualcomm	qca6431_firmware	—	cpe:2.3:o:qualcomm:qca6431_firmware:-:::::::*
qualcomm	qca6436_firmware	—	cpe:2.3:o:qualcomm:qca6436_firmware:-:::::::*
qualcomm	qca6564_firmware	—	cpe:2.3:o:qualcomm:qca6564_firmware:-:::::::*
qualcomm	qca6564a_firmware	—	cpe:2.3:o:qualcomm:qca6564a_firmware:-:::::::*
qualcomm	qca6564au_firmware	—	cpe:2.3:o:qualcomm:qca6564au_firmware:-:::::::*
qualcomm	qca6574_firmware	—	cpe:2.3:o:qualcomm:qca6574_firmware:-:::::::*
qualcomm	qca6574a_firmware	—	cpe:2.3:o:qualcomm:qca6574a_firmware:-:::::::*
qualcomm	qca6574au_firmware	—	cpe:2.3:o:qualcomm:qca6574au_firmware:-:::::::*
qualcomm	qca6595_firmware	—	cpe:2.3:o:qualcomm:qca6595_firmware:-:::::::*
qualcomm	qca6595au_firmware	—	cpe:2.3:o:qualcomm:qca6595au_firmware:-:::::::*
qualcomm	qca6696_firmware	—	cpe:2.3:o:qualcomm:qca6696_firmware:-:::::::*
qualcomm	qca9367_firmware	—	cpe:2.3:o:qualcomm:qca9367_firmware:-:::::::*
qualcomm	qca9377_firmware	—	cpe:2.3:o:qualcomm:qca9377_firmware:-:::::::*
qualcomm	qca9379_firmware	—	cpe:2.3:o:qualcomm:qca9379_firmware:-:::::::*
qualcomm	qcm4290_firmware	—	cpe:2.3:o:qualcomm:qcm4290_firmware:-:::::::*
qualcomm	qcm6125_firmware	—	cpe:2.3:o:qualcomm:qcm6125_firmware:-:::::::*
qualcomm	qcs405_firmware	—	cpe:2.3:o:qualcomm:qcs405_firmware:-:::::::*
qualcomm	qcs410_firmware	—	cpe:2.3:o:qualcomm:qcs410_firmware:-:::::::*
qualcomm	qcs4290_firmware	—	cpe:2.3:o:qualcomm:qcs4290_firmware:-:::::::*
qualcomm	qcs603_firmware	—	cpe:2.3:o:qualcomm:qcs603_firmware:-:::::::*
qualcomm	qcs605_firmware	—	cpe:2.3:o:qualcomm:qcs605_firmware:-:::::::*
qualcomm	qcs610_firmware	—	cpe:2.3:o:qualcomm:qcs610_firmware:-:::::::*
qualcomm	qcs6125_firmware	—	cpe:2.3:o:qualcomm:qcs6125_firmware:-:::::::*
qualcomm	qrb5165_firmware	—	cpe:2.3:o:qualcomm:qrb5165_firmware:-:::::::*
qualcomm	qsm8250_firmware	—	cpe:2.3:o:qualcomm:qsm8250_firmware:-:::::::*
qualcomm	qsw8573_firmware	—	cpe:2.3:o:qualcomm:qsw8573_firmware:-:::::::*
qualcomm	qualcomm215_firmware	—	cpe:2.3:o:qualcomm:qualcomm215_firmware:-:::::::*
qualcomm	sa6145p_firmware	—	cpe:2.3:o:qualcomm:sa6145p_firmware:-:::::::*
qualcomm	sa6150p_firmware	—	cpe:2.3:o:qualcomm:sa6150p_firmware:-:::::::*
qualcomm	sa6155_firmware	—	cpe:2.3:o:qualcomm:sa6155_firmware:-:::::::*
qualcomm	sa6155p_firmware	—	cpe:2.3:o:qualcomm:sa6155p_firmware:-:::::::*
qualcomm	sa8145p_firmware	—	cpe:2.3:o:qualcomm:sa8145p_firmware:-:::::::*
qualcomm	sa8150p_firmware	—	cpe:2.3:o:qualcomm:sa8150p_firmware:-:::::::*
qualcomm	sa8155_firmware	—	cpe:2.3:o:qualcomm:sa8155_firmware:-:::::::*
qualcomm	sa8155p_firmware	—	cpe:2.3:o:qualcomm:sa8155p_firmware:-:::::::*
qualcomm	sa8195p_firmware	—	cpe:2.3:o:qualcomm:sa8195p_firmware:-:::::::*
qualcomm	sd_636_firmware	—	cpe:2.3:o:qualcomm:sd_636_firmware:-:::::::*
qualcomm	sd_675_firmware	—	cpe:2.3:o:qualcomm:sd_675_firmware:-:::::::*
qualcomm	sd429_firmware	—	cpe:2.3:o:qualcomm:sd429_firmware:-:::::::*
qualcomm	sd439_firmware	—	cpe:2.3:o:qualcomm:sd439_firmware:-:::::::*
qualcomm	sd450_firmware	—	cpe:2.3:o:qualcomm:sd450_firmware:-:::::::*
qualcomm	sd460_firmware	—	cpe:2.3:o:qualcomm:sd460_firmware:-:::::::*
qualcomm	sd632_firmware	—	cpe:2.3:o:qualcomm:sd632_firmware:-:::::::*
qualcomm	sd662_firmware	—	cpe:2.3:o:qualcomm:sd662_firmware:-:::::::*
qualcomm	sd665_firmware	—	cpe:2.3:o:qualcomm:sd665_firmware:-:::::::*
qualcomm	sd675_firmware	—	cpe:2.3:o:qualcomm:sd675_firmware:-:::::::*
qualcomm	sd678_firmware	—	cpe:2.3:o:qualcomm:sd678_firmware:-:::::::*

References for CVE-2021-1949

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/october-2021-bulletin	Vendor Advisory

URL

CVE-2021-1949

Exploit prediction scoring system (EPSS) score for CVE-2021-1949

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1949

Weakness enumeration for CVE-2021-1949

Affected software / configurations for CVE-2021-1949

References for CVE-2021-1949