Vulnerability identifier: #VU93382

Vulnerability 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

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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:

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

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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.