CVE-2019-20794

Medium

An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.

Package Linux Kernel
Published 2020-05-09
Last modified 2024-11-21
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

4.7

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

Weakness type

CWE-772

CVE-2019-20794 is a Missing Release of Resource after Effective Lifetime vulnerability

What is Missing Release of Resource after Effective Lifetime?

The product does not release a resource after its effective lifetime has ended. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2019-20794 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2019-20794?

    CVE-2019-20794 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Missing Release of Resource after Effective Lifetime flaw (CWE-772) . CVE-2019-20794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2019-20794?

    CVE-2019-20794 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2019-20794?

    No patch is currently available for CVE-2019-20794. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2019-20794 actively exploited?

    No — CVE-2019-20794 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is Missing Release of Resource after Effective Lifetime (CWE-772)?

    The product does not release a resource after its effective lifetime has ended. View CWE-772 on MITRE CWE →

Back to
All CVEs
View on
NVD / NIST