#VU68552 Memory leak in Linux kernel - CVE-2021-30002

Vulnerability identifier: #VU68552

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-2021-30002

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 DoS attack on the target system.

The vulnerability exists due memory leak within the webcam support driver in video_usercopy() function in drivers/media/v4l2-core/v4l2-ioctl.c in Linux kernel. A local user can trigger leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.11.3

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External links
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.3
https://bugzilla.suse.com/show_bug.cgi?id=1184120
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb18802a338b36f675a388fc03d2aa504a0d0899
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?