Vulnerability identifier: #VU90233

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-2021-47100

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 cleanup_bmc_device() function in drivers/char/ipmi/ipmi_msghandler.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/925229d552724e1bba1abf01d3a0b1318539b012
http://git.kernel.org/stable/c/992649b8b16843d27eb39ceea5f9cf85ffb50a18
http://git.kernel.org/stable/c/6809da5185141e61401da5b01896b79a4deed1ad
http://git.kernel.org/stable/c/6b3f7e4b10f343f05b5fb513b07a9168fbf1172e
http://git.kernel.org/stable/c/ffb76a86f8096a8206be03b14adda6092e18e275

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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.