#VU57904 Time-of-check Time-of-use (TOCTOU) Race Condition in Qualcomm products - CVE-2021-1921
Published: November 3, 2021
Vulnerability identifier: #VU57904
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-1921
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
AQT1000
QCA6390
QCA6391
QCA6420
QCA6421
QCA6426
QCA6430
QCA6431
QCA6436
QCA6595
QCM6490
QCS6490
QRB5165
QRB5165N
QSM8350
SA8195P
SD 8C
SD 8CX
SD778G
SD780G
SD865 5G
SD870
SD888 5G
SDM830
SDX55M
SDXR2 5G
SM7325
WCD9340
WCD9341
WCD9360
WCD9370
WCD9375
WCD9380
WCD9385
WCN3950
WCN3980
WCN3990
WCN3998
WCN6740
WCN6750
WCN6850
WCN6851
WCN6855
WCN6856
WCN7850
WCN7851
WHS9410
WSA8810
WSA8815
WSA8830
WSA8835
QCA6574AU
SA6155P
SD675
SD855
SDX24
SDX55
AQT1000
QCA6390
QCA6391
QCA6420
QCA6421
QCA6426
QCA6430
QCA6431
QCA6436
QCA6595
QCM6490
QCS6490
QRB5165
QRB5165N
QSM8350
SA8195P
SD 8C
SD 8CX
SD778G
SD780G
SD865 5G
SD870
SD888 5G
SDM830
SDX55M
SDXR2 5G
SM7325
WCD9340
WCD9341
WCD9360
WCD9370
WCD9375
WCD9380
WCD9385
WCN3950
WCN3980
WCN3990
WCN3998
WCN6740
WCN6750
WCN6850
WCN6851
WCN6855
WCN6856
WCN7850
WCN7851
WHS9410
WSA8810
WSA8815
WSA8830
WSA8835
QCA6574AU
SA6155P
SD675
SD855
SDX24
SDX55
Software vendor:
Qualcomm
Qualcomm
Description
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to Improper handling of hypervisor unmap operations for concurrent memory operations. A local user can send a specially crafted data and execute arbitrary code on the target system.
Remediation
Install updates from vendor's website.