#VU61881 Type conversion in Qualcomm products - CVE-2021-35091

Vulnerability identifier: #VU61881

Vulnerability risk: Low

CVSSv4.0: 5.9 [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-2021-35091

CWE-ID: CWE-704

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
SD8Gen15G
Mobile applications / Mobile firmware & hardware
WCD9380
Mobile applications / Mobile firmware & hardware
WCN6855
Mobile applications / Mobile firmware & hardware
WCN6856
Mobile applications / Mobile firmware & hardware
WSA8830
Mobile applications / Mobile firmware & hardware
WSA8835
Mobile applications / Mobile firmware & hardware

Vendor: Qualcomm

Description

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

The vulnerability exists due to a type conversion error in Linux Graphics subsystem when handling page fault for global memory. A local application can trigger memory corruption and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SD8Gen15G: All versions

WCD9380: All versions

WCN6855: All versions

WCN6856: All versions

WSA8830: All versions

WSA8835: All versions

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External links
https://www.qualcomm.com/company/product-security/bulletins/april-2022-bulletin
https://source.codeaurora.org/quic/la/kernel/msm-5.10/commit/?id=9ca200b6d0df44ba423a908dbda97cbf4c7bb10a

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.