What is CVE-2021-20177?

CVE-2021-20177 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10, classified as a Out-of-bounds Read flaw (CWE-125). CVE-2021-20177 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-20177?

CVE-2021-20177 has a CVSS score of 4.4 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-20177?

No patch is currently available for CVE-2021-20177. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-20177 actively exploited?

CVE-2021-20177 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2021-20177

Medium

A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.

Package Linux Kernel

Published 2021-05-26

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.4

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2021-20177 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-20177 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1914719
Patch

Details

CVE ID CVE-2021-20177

Severity Medium

CVSS score 4.4 / 10

CVSS version 3.1

Published 2021-05-26

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-20177?

CVE-2021-20177 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . CVE-2021-20177 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-20177?

CVE-2021-20177 has a CVSS score of 4.4 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-20177?

No patch is currently available for CVE-2021-20177. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-20177 actively exploited?

No — CVE-2021-20177 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. View CWE-125 on MITRE CWE →