What is CVE-2021-38209?

CVE-2021-38209 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10. CVE-2021-38209 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-38209?

CVE-2021-38209 has a CVSS score of 3.3 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Is there a patch available for CVE-2021-38209?

No patch is currently available for CVE-2021-38209. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-38209 actively exploited?

CVE-2021-38209 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-38209

Low

net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls.

Package Linux Kernel

Published 2021-08-08

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

3.3

out of 10

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-203

CVE-2021-38209 is classified as CWE-203

See CWE-203 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-38209 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6
Patch

Details

CVE ID CVE-2021-38209

Severity Low

CVSS score 3.3 / 10

CVSS version 3.1

Published 2021-08-08

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-38209?

CVE-2021-38209 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10 . CVE-2021-38209 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-38209?

CVE-2021-38209 has a CVSS score of 3.3 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Is there a patch available for CVE-2021-38209?

No patch is currently available for CVE-2021-38209. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-38209 actively exploited?

No — CVE-2021-38209 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.