What is CVE-2021-20261?

CVE-2021-20261 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.4 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2021-20261 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-20261?

CVE-2021-20261 has a CVSS score of 6.4 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-20261?

No patch is currently available for CVE-2021-20261. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-20261 actively exploited?

CVE-2021-20261 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2021-20261

Medium

A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.

Package Linux Kernel

Published 2021-03-11

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.4

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-362

CVE-2021-20261 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-20261 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1932150
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0c80efe5956ccce9fe7ae5c78542578c07bc20a
Patch

Details

CVE ID CVE-2021-20261

Severity Medium

CVSS score 6.4 / 10

CVSS version 3.1

Published 2021-03-11

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-20261?

CVE-2021-20261 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.4 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2021-20261 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-20261?

CVE-2021-20261 has a CVSS score of 6.4 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-20261?

No patch is currently available for CVE-2021-20261. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-20261 actively exploited?

No — CVE-2021-20261 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →