What is CVE-2021-26708?

CVE-2021-26708 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Improper Locking flaw (CWE-667). CVE-2021-26708 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-26708?

CVE-2021-26708 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-2021-26708?

No patch is currently available for CVE-2021-26708. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-26708 actively exploited?

CVE-2021-26708 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2021-26708

High

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

Package Linux Kernel

Published 2021-02-05

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-667

CVE-2021-26708 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-26708 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://www.openwall.com/lists/oss-security/2021/04/09/2

Mailing List
Openwall
http://www.openwall.com/lists/oss-security/2022/01/25/14

Mailing List
Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13

Release Notes Vendor Advisory
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/02/05/6
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446
Patch
Kernel patch commit
https://security.netapp.com/advisory/ntap-20210312-0008/
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-26708

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2021-02-05

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-26708?

CVE-2021-26708 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as an Improper Locking flaw (CWE-667) . CVE-2021-26708 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-26708?

CVE-2021-26708 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-2021-26708?

No patch is currently available for CVE-2021-26708. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-26708 actively exploited?

No — CVE-2021-26708 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. View CWE-667 on MITRE CWE →