What is CVE-2021-47248?

CVE-2021-47248 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2021-47248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47248?

CVE-2021-47248 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47248?

No patch is currently available for CVE-2021-47248. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47248 actively exploited?

CVE-2021-47248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2021-47248

Medium

In the Linux kernel, the following vulnerability has been resolved: udp: fix race between close() and udp_abort() Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions. We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens. Diagnosed-and-tested-by: Kaustubh Pandey <[email protected]>

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-30

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2021-47248 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-47248 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56
Patch
Kernel patch commit
https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2021-47248

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-30

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47248?

CVE-2021-47248 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2021-47248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47248?

CVE-2021-47248 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47248?

No patch is currently available for CVE-2021-47248. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47248 actively exploited?

No — CVE-2021-47248 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →