#VU63568 Memory leak in Linux kernel - CVE-2021-45480

Vulnerability identifier: #VU63568

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/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-2021-45480

CWE-ID: CWE-401

Exploitation vector: Network

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 __rds_conn_create() function in net/rds/connection.c. A local user can perform a denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15.0 - 5.15.10

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External links
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
https://github.com/torvalds/linux/commit/5f9562ebe710c307adc5f666bf1a2162ee7977c0
https://www.debian.org/security/2022/dsa-5050
https://www.debian.org/security/2022/dsa-5096
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.