CVE-2021-30002
First published: Fri Apr 02 2021(Updated: )
A flaw memory leak in the Linux kernel webcam device functionality was found in the way user calls ioctl that triggers video_usercopy function. The highest threat from this vulnerability is to system availability.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-425.3.1.rt7.213.el8 | 0:4.18.0-425.3.1.rt7.213.el8 |
| redhat/kernel | <0:4.18.0-425.3.1.el8 | 0:4.18.0-425.3.1.el8 |
| redhat/Kernel | <5.12 | 5.12 |
| Linux Kernel | <5.11.3 | |
| Debian Linux | =9.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
Remedy
To mitigate this issue, prevent the module v4l2-common from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-30002 https://nvd.nist.gov/vuln/detail/CVE-2021-30002 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fb18802a338b36f675a388fc03d2aa504a0d0899
- https://bugzilla.redhat.com/show_bug.cgi?id=1946279
- https://access.redhat.com/errata/RHSA-2022:7444
- https://access.redhat.com/errata/RHSA-2022:7683
- https://access.redhat.com/security/cve/cve-2021-30002
- 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://launchpad.net/bugs/cve/CVE-2021-30002
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1946280
- https://access.redhat.com/solutions/41278
- https://access.redhat.com/errata/RHSA-2024:0724
- https://git.kernel.org/linus/fb18802a338b36f675a388fc03d2aa504a0d0899
- https://security-tracker.debian.org/tracker/CVE-2021-30002
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30002
- https://nvd.nist.gov/vuln/detail/CVE-2021-30002
- https://ubuntu.com/security/CVE-2021-30002
Frequently Asked Questions
What is the severity of CVE-2021-30002?
CVE-2021-30002 has a severity level that primarily affects system availability due to a memory leak in the Linux kernel's webcam device functionality.
How do I fix CVE-2021-30002?
To fix CVE-2021-30002, update your Linux kernel to version 5.12 or later, or to the specified remedial versions for Red Hat and Debian systems.
Which Linux versions are affected by CVE-2021-30002?
CVE-2021-30002 affects all versions of the Linux kernel prior to 5.11.3.
What is the impact of CVE-2021-30002 on my system?
The impact of CVE-2021-30002 is a potential memory leak that could lead to decreased system performance and availability.
Is CVE-2021-30002 specific to certain distributions?
Yes, CVE-2021-30002 specifically affects various Linux distributions including Red Hat and Debian, based on the kernel versions they are running.
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