What is CVE-2021-38208?

CVE-2021-38208 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2021-38208 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-38208?

CVE-2021-38208 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-38208?

No patch is currently available for CVE-2021-38208. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-38208 actively exploited?

CVE-2021-38208 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-38208

Medium

net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure of a bind call.

Package Linux Kernel

Published 2021-08-08

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2021-38208 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-38208 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/2021/08/17/1

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2021/08/17/2

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2021/08/24/2

Mailing List Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1992810
Patch
Kernel patch commit
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba
Patch

Details

CVE ID CVE-2021-38208

Severity Medium

CVSS score 5.5 / 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-2021-38208?

CVE-2021-38208 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2021-38208 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-38208?

CVE-2021-38208 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-38208?

No patch is currently available for CVE-2021-38208. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-38208 actively exploited?

No — CVE-2021-38208 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →