What is CVE-2021-3635?

CVE-2021-3635 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10, classified as a Buffer Overflow flaw (CWE-119). CVE-2021-3635 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3635?

CVE-2021-3635 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-2021-3635?

No patch is currently available for CVE-2021-3635. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3635 actively exploited?

CVE-2021-3635 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2021-3635

Medium

A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands.

Package Linux Kernel

Published 2021-08-13

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-119

CVE-2021-3635 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-3635 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1976946

Issue Tracking Third Party Advisory

Details

CVE ID CVE-2021-3635

Severity Medium

CVSS score 4.4 / 10

CVSS version 3.1

Published 2021-08-13

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3635?

CVE-2021-3635 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2021-3635 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3635?

CVE-2021-3635 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-2021-3635?

No patch is currently available for CVE-2021-3635. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3635 actively exploited?

No — CVE-2021-3635 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. View CWE-119 on MITRE CWE →