Memory leak in Linux kernel nfc

1) Memory leak

EUVDB-ID: #VU89937

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47443

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the digital_tg_configure_hw() and digital_tg_listen_mdaa() functions in net/nfc/digital_core.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

External links

http://git.kernel.org/stable/c/429054ec51e648d241a7e0b465cf44f6633334c5
http://git.kernel.org/stable/c/a67d47e32c91e2b10402cb8c081774cbf08edb2e
http://git.kernel.org/stable/c/b7b023e6ff567e991c31cd425b0e1d16779c938b
http://git.kernel.org/stable/c/9881b0c860649f27ef2565deef011e516390f416
http://git.kernel.org/stable/c/7ab488d7228a9dceb2456867f1f0919decf6efed
http://git.kernel.org/stable/c/3f2960b39f22e26cf8addae93c3f5884d1c183c9
http://git.kernel.org/stable/c/564249219e5b5673a8416b5181875d828c3f1e8c
http://git.kernel.org/stable/c/58e7dcc9ca29c14e44267a4d0ea61e3229124907

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.