Buffer overflow in Linux kernel soc codecs

1) Buffer overflow

EUVDB-ID: #VU93137

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-2021-47502

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to memory corruption within the slim_rx_mux_get(), slim_rx_mux_put() and slim_tx_mixer_put() functions in sound/soc/codecs/wcd934x.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/1089dac26c6b4b833323ae6c0ceab29fb30ede72
https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1
https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101

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.