What is CVE-2021-47244?

CVE-2021-47244 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.2 out of 10, classified as a Out-of-bounds Read flaw (CWE-125). CVE-2021-47244 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47244?

CVE-2021-47244 has a CVSS score of 6.2 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47244?

No patch is currently available for CVE-2021-47244. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47244 actively exploited?

CVE-2021-47244 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-2021-47244

Medium

In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options.").

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-04

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.2

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2021-47244 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-2021-47244 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/07718be265680dcf496347d475ce1a5442f55ad7
Patch
Kernel patch commit
https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58
Patch
Kernel patch commit
https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037
Patch

Details

CVE ID CVE-2021-47244

Severity Medium

CVSS score 6.2 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-04

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47244?

CVE-2021-47244 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.2 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . CVE-2021-47244 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47244?

CVE-2021-47244 has a CVSS score of 6.2 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47244?

No patch is currently available for CVE-2021-47244. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47244 actively exploited?

No — CVE-2021-47244 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 →