CVE-2021-3739

High

A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.

Package Linux Kernel
Published 2022-03-10
Last modified 2024-11-21
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.1

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness type

CWE-476

CVE-2021-3739 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

6 total
Showing 5 of 6 references View all on NVD

Frequently asked questions

  • What is CVE-2021-3739?

    CVE-2021-3739 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2021-3739 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2021-3739?

    CVE-2021-3739 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H .

  • Is there a patch available for CVE-2021-3739?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2021-3739 patch availability.

  • Is CVE-2021-3739 actively exploited?

    No. CVE-2021-3739 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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