#VU89970 Memory leak in Linux kernel - CVE-2021-47422

Vulnerability identifier: #VU89970

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-2021-47422

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 nv50_head_crc_late_register() function in drivers/gpu/drm/nouveau/dispnv50/crc.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/65fff0a8efcdca8d84ffe3e23057c3b32403482d
https://git.kernel.org/stable/c/0b4e9fc14973a94ac0520f19b3633493ae13c912
https://git.kernel.org/stable/c/0b3d4945cc7e7ea1acd52cb06dfa83bfe265b6d5

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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.