Use-after-free in Qualcomm products - CVE-2021-1978

Vulnerability identifier: #VU55528

CSH Severity: Low

CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-1978

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
APQ8017
APQ8053
MSM8917
MSM8953
QCS405
QCS605
SD636
SD675
SD665
SD670
SD730
SD835
SD855
SD888
SDM630
SDX55
AQT1000
AR8031
AR8035
CSRA6620
CSRA6640
QCA6310
QCA6320
QCA6390
QCA6391
QCA6420
QCA6426
QCA6430
QCA6436
QCA8337
QCM2290
QCM4290
QCM6125
QCS2290
QCS4290
QCS603
QCS610
QCS6125
QCX315
Qualcomm215
SD455
SD429
SD439
SD460
SD480
SD632
SD662
SD678
SD6905G
SD720G
SD750G
SD765
SD765G
SD768G
SD778G
SD780G
SD8655G
SD870
SD8885G
SDX50M
SDX55M
SDXR1
SDXR25G
SM4125
SM6250
SM6250P
SM7250
SM7325
WCD9340
WCD9370
WCD9375
WCD9380
WCD9385
WCN3615
WCN3660B
WCN3680
WCN3680B
WCN3910
WCN3950
WCN3988
WCN3991
WCN3998
WCN3999
WCN6740
WCN6750
WCN6850
WCN6851
WCN6856
WSA8810
WSA8815
WSA8830
WSA8835

Software vendor:
Qualcomm

The vulnerability allows a local attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when handling scheduled QMI callbacks at the time of deinitialization in WLAN HOST. An attacker with physical access to device can trigger a use-after-free error and compromise the affected device.

Install updates from vendor's website.

• https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin
• https://source.codeaurora.org/quic/la/platform/external/wpa_supplicant_8/commit?id=ddffe981e88146adf777ce64c1c2dac2e1dad05e