Race condition in Linux kernel nvme target driver

1) Race condition

EUVDB-ID: #VU93382

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-2021-47130

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition within the nvmet_data_transfer_len(), nvmet_req_find_p2p_dev() and nvmet_req_free_sgls() functions in drivers/nvme/target/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

CPE2.3

External links

http://git.kernel.org/stable/c/c440cd080761b18a52cac20f2a42e5da1e3995af
http://git.kernel.org/stable/c/8a452d62e7cea3c8a2676a3b89a9118755a1a271
http://git.kernel.org/stable/c/bcd9a0797d73eeff659582f23277e7ab6e5f18f3

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.