NULL pointer dereference in Linux kernel nvme target driver

1) NULL pointer dereference

EUVDB-ID: #VU90643

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-2021-46983

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference within the nvmet_rdma_send_done() and nvmet_rdma_write_data_done() functions in drivers/nvme/target/rdma.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/64f3410c7bfc389b1a58611d0799f4a36ce4b6b5
http://git.kernel.org/stable/c/17fb6dfa5162b89ecfa07df891a53afec321abe8
http://git.kernel.org/stable/c/5bdb34466ad8370546dfa0497594fb1d6f2fed90
http://git.kernel.org/stable/c/8cc365f9559b86802afc0208389f5c8d46b4ad61

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.