#VU104408 Memory leak in Linux kernel - CVE-2021-47654

Vulnerability identifier: #VU104408

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-2021-47654

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 populate_ruleset() function in samples/landlock/sandboxer.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/017196730299ccd6eed24bbfabed8af4ffd81530
https://git.kernel.org/stable/c/20fbf100f84b9aeb9c91421abe1927bc152bc32b
https://git.kernel.org/stable/c/49b0d8bf05809df5f87e5c03e26d74bdfdab4571
https://git.kernel.org/stable/c/66b513b7c64a7290c1fbb88e657f7cece992e131

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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.