#VU91619 Memory leak in Linux kernel - CVE-2021-47466

Vulnerability identifier: #VU91619

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47466

CWE-ID: CWE-401

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 memory leak within the kmem_cache_open() function in mm/slub.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

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External links
https://git.kernel.org/stable/c/4f5d1c29cfab5cb0ab885059818751bdef32e2bb
https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930
https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f
https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461

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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.