What is CVE-2021-3923?

CVE-2021-3923 is a Low severity Linux kernel vulnerability with a CVSS score of 2.3 out of 10, classified as a Information Exposure flaw (CWE-200). CVE-2021-3923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3923?

CVE-2021-3923 has a CVSS score of 2.3 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

Is there a patch available for CVE-2021-3923?

No patch is currently available for CVE-2021-3923. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3923 actively exploited?

CVE-2021-3923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2021-3923

Low

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdma_cm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

Package Linux Kernel

Published 2023-03-27

Last modified 2025-02-24

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

2.3

out of 10

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-200

CVE-2021-3923 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-3923 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel.org
https://lore.kernel.org/all/20220204100036.GA12348%40kili/
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=2019643
Patch

Details

CVE ID CVE-2021-3923

Severity Low

CVSS score 2.3 / 10

CVSS version 3.1

Published 2023-03-27

Modified 2025-02-24

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3923?

CVE-2021-3923 is a Low severity Linux kernel vulnerability with a CVSS score of 2.3 out of 10 , classified as an Information Exposure flaw (CWE-200) . CVE-2021-3923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3923?

CVE-2021-3923 has a CVSS score of 2.3 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
Is there a patch available for CVE-2021-3923?

No patch is currently available for CVE-2021-3923. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3923 actively exploited?

No — CVE-2021-3923 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. View CWE-200 on MITRE CWE →