Remote denial of service in Linux kernel nvme driver

1) Improper locking

EUVDB-ID: #VU89745

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47041

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the nvmet_tcp_state_change() function in drivers/nvme/target/tcp.c. An remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/999d606a820c36ae9b9e9611360c8b3d8d4bb777
http://git.kernel.org/stable/c/60ade0d56b06537a28884745059b3801c78e03bc
http://git.kernel.org/stable/c/06beaa1a9f6e501213195e47c30416032fd2bbd5
http://git.kernel.org/stable/c/906c538340dde6d891df89fe7dac8eaa724e40da
http://git.kernel.org/stable/c/b5332a9f3f3d884a1b646ce155e664cc558c1722

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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