Improper locking in Linux kernel inline_crypto ch_ktls driver

1) Improper locking

EUVDB-ID: #VU92052

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-2021-46911

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 chcr_ktls_xmit() function in drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.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/8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091f
http://git.kernel.org/stable/c/8348665d4181c68b0ca1205b48e1753d78bc810f
http://git.kernel.org/stable/c/1a73e427b824133940c2dd95ebe26b6dce1cbf10

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.