What is CVE-2021-31440?

CVE-2021-31440 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Incorrect Calculation flaw (CWE-682). CVE-2021-31440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-31440?

CVE-2021-31440 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-31440?

No patch is currently available for CVE-2021-31440. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-31440 actively exploited?

CVE-2021-31440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Incorrect Calculation (CWE-682)?

The product performs a calculation that generates incorrect or unintended results. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/682.html

CVE-2021-31440

High

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.

Package Linux Kernel

Published 2021-05-21

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-682

CVE-2021-31440 is a Incorrect Calculation vulnerability

What is Incorrect Calculation?

The product performs a calculation that generates incorrect or unintended results. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-31440 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Security
https://security.netapp.com/advisory/ntap-20210706-0003/

Third Party Advisory
Zerodayinitiative
https://www.zerodayinitiative.com/advisories/ZDI-21-503/

Third Party Advisory VDB Entry
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bf4e83167cc68595b85fd73bb91e8f2c086e36
Patch

Details

CVE ID CVE-2021-31440

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2021-05-21

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-31440?

CVE-2021-31440 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as an Incorrect Calculation flaw (CWE-682) . CVE-2021-31440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-31440?

CVE-2021-31440 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-31440?

No patch is currently available for CVE-2021-31440. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-31440 actively exploited?

No — CVE-2021-31440 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Incorrect Calculation (CWE-682)?

The product performs a calculation that generates incorrect or unintended results. View CWE-682 on MITRE CWE →