What’s Vulnerable › Vulnerabilities

CVE-2021-30002

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-401

Description

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.

Affected products

• Debian Linux: 9.0
• Linux kernel: before 5.11.3 — fixed in 5.11.3

How to fix

Upgrade to a fixed version: Linux kernel 5.11.3. Check the vendor advisory for mitigations.

References

• https://bugzilla.suse.com/show_bug.cgi?id=1184120
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.3
• 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
• https://bugzilla.suse.com/show_bug.cgi?id=1184120
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.3
• 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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