What is CVE-2021-30002?

CVE-2021-30002 is a medium-severity vulnerability in Linux Kernel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.2/10. Published 2021-04-02.

How severe is CVE-2021-30002?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Vulnerability in Linux Kernel

CVE-2021-30002

An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.

Published 2021-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
bugzilla.suse.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.3 (Patch, Vendor Advisory)
lists.debian.org/debian-lts-announce/2021/06/msg00020.html (mailing-list, Third Party Advisory)

Frequently asked questions

What is CVE-2021-30002?: CVE-2021-30002 is a medium-severity vulnerability in Linux Kernel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.2/10. Published 2021-04-02.
How severe is CVE-2021-30002?: Medium severity. CVSS v3 base score is 6.2 out of 10.