#VU104407 Memory leak in Linux kernel - CVE-2021-47653

Vulnerability identifier: #VU104407

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-2021-47653

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 MODULE_ALIAS(), vpif_channel_getfid() and vpif_probe() functions in drivers/media/platform/davinci/vpif.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.16, 5.16 rc1, 5.16 rc2, 5.16 rc3, 5.16 rc4, 5.16 rc5, 5.16 rc6, 5.16 rc8, 5.16.0, 5.16.1, 5.16.2, 5.16.3, 5.16.4, 5.16.5, 5.16.6, 5.16.7, 5.16.8, 5.16.9, 5.16.10, 5.16.11, 5.16.12, 5.16.13, 5.16.14, 5.16.15, 5.16.16, 5.16.17, 5.16.18

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External links
https://git.kernel.org/stable/c/43acb728bbc40169d2e2425e84a80068270974be
https://git.kernel.org/stable/c/6512c3c39cb6b573b791ce45365818a38b76afbe
https://git.kernel.org/stable/c/9ffc602e14d7b9f7e7cb2f67e18dfef9ef8af676
https://git.kernel.org/stable/c/b5a3bb7f6f164eb6ee74ef4898dcd019b2063448
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.19

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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.