CVE-2020-27835

Name: CVE-2020-27835
Creator: NVD / NIST
Published: 2021-01-07T18:15:13.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2020-27835 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system.

Metrics

CVSS 3.1

4.4/10

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

EPSS Probability

0.31%

22.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions	Update
Linux	Infiniband Hfi1 Driver	<= 5.9	—
Linux	Infiniband Hfi1 Driver	5.10	Rc1

References

https://bugzilla.redhat.com/show_bug.cgi?id=1901709Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1901709Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jan 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27835?

How severe is CVE-2020-27835?

CVE-2020-27835 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27835?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27835?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST