Improper locking in Linux kernel rtl8723bs core driver

1) Improper locking

EUVDB-ID: #VU104699

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49309

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the rtw_surveydone_event_callback() and rtw_scan_timeout_handler() functions in drivers/staging/rtl8723bs/core/rtw_mlme.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/2c41f5c341853f84b7bc2f32605d4e2782e8c279
https://git.kernel.org/stable/c/cc7ad0d77b51c872d629bcd98aea463a3c4109e7
https://git.kernel.org/stable/c/ce129d3efd181da5fd56f4360cc8827122afa67e
https://git.kernel.org/stable/c/f89f6c3ebf69623b8ea48200bd690e9e210335a1

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.