Buffer overflow in Qualcomm products - CVE-2021-1931

Vulnerability identifier: #VU54536

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-1931

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: Public exploit is available

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to improper validation of buffer length while processing fast boot commands. A local application can trigger memory corruption and execute arbitrary code with elevated privileges.

SD855
SDX55
SDX24
SDM630
SD888
SD845
SD835
SD730
SD710
SD670
SD665
QCA6574AU
QCA9377
QCA6174A
SD675
SD636
SA6155P
QCS605
QCS405
SM6250
SM4125
SDXR25G
SDXR1
SDX55M
SDX50M
SDM830
SD8885G
SD870
SD8655G
SM6250P
SD780G
SD778G
SD768G
SD765G
SD765
SD750G
SD720G
SD6905G
SD678
WCN3980
WSA8835
WSA8830
WSA8815
WSA8810
WCN6856
WCN6851
WCN6850
WCN6750
WCN6740
WCN3999
WCN3998
WCN3991
WCN3990
WCN3988
WCN3950
WCN3910
WCD9385
WCD9380
WCD9375
WCD9371
WCD9370
WCD9341
WCD9340
WCD9335
WCD9326
SM7325P
SM7315
SM7250P
QCA6421
QCA8337
QCA6696
QCA6595AU
QCA6584AU
QCA6574A
QCA6574
QCA6564AU
QCA6564A
QCA6564
QCA6436
QCA6431
QCA6430
QCA6426
QCA6420
QCA6391
QCA6390
QCA6335
QCA6320
QCA6310
FSM10056
FSM10055
CSRB31024
CSRA6640
CSRA6620
AR8035
AR8031
SA6155
SD662
SD660
SD480
SD460
SD8CX
SD8C
SA8195P
SA8155P
SA8155
SA8150P
SA8145P
AQT1000
SA6150P
SA6145P
SA415M
QCS6125
QCS610
QCS603
QCS4290
QCS410
QCS2290
QCM6125
QCM4290
QCM2290

Install updates from vendor's website.

• Exploit #11362 - CVE-2021-1931-BBRY-KEY2 (proof of concept CVE-2021-1931 exploit for the blackberry key2 (le) that allows to flash unsigned images temporarily) (May 9, 2025)

• https://www.qualcomm.com/company/product-security/bulletins/july-2021-bulletin
• https://source.codeaurora.org/quic/le/abl/tianocore/edk2/commit/?id=0727b7b0d4cafb091397b76f75a3a4f66852a361

• Multiple vulnerabilities in Qualcomm chipsets