Vulnerability identifier: #VU92301

Vulnerability risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47596

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hclgevf_send_mbx_msg() function in drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/12512bc8f25b8ba9795dfbae0e9ca57ff13fd542
http://git.kernel.org/stable/c/4f4a353f6fe033807cd026a5de81c67469ff19b0
http://git.kernel.org/stable/c/27cbf64a766e86f068ce6214f04c00ceb4db1af4

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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.