CVE-2020-7463

Name: CVE-2020-7463
Creator: NVD / NIST
Published: 2021-03-26T21:15:13.193+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2020-7463 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In FreeBSD 12.1-STABLE before r364644, 11.4-STABLE before r364651, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, improper handling in the kernel causes a use-after-free bug by sending large user messages from multiple threads on the same SCTP socket. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

In FreeBSD 12.1-STABLE before r364644, 11.4-STABLE before r364651, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, improper handling in the kernel causes a use-after-free bug by sending large user messages from multiple threads on the same SCTP socket. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.40%

31.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	11.3
Freebsd	Freebsd	11.4
Freebsd	Freebsd	12.1
Freebsd	Freebsd	12.2
Apple	Icloud	< 12.3
Apple	Itunes	< 12.11.3
Apple	Safari	< 14.1
Apple	Ipados	< 14.5
Apple	Iphone Os	< 14.5
Apple	Macos	>= 11.0, < 11.3
Apple	Tvos	< 14.5
Apple	Watchos	< 7.4

References

http://seclists.org/fulldisclosure/2021/Apr/49Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/50Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/57Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/58Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/59Mailing List, Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:25.sctp.ascVendor Advisory
https://support.apple.com/kb/HT212317Third Party Advisory
https://support.apple.com/kb/HT212318Third Party Advisory
https://support.apple.com/kb/HT212319Third Party Advisory
https://support.apple.com/kb/HT212321Third Party Advisory
https://support.apple.com/kb/HT212323Third Party Advisory
https://support.apple.com/kb/HT212324Third Party Advisory
https://support.apple.com/kb/HT212325Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/49Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/50Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/57Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/58Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/59Mailing List, Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:25.sctp.ascVendor Advisory
https://support.apple.com/kb/HT212317Third Party Advisory
https://support.apple.com/kb/HT212318Third Party Advisory
https://support.apple.com/kb/HT212319Third Party Advisory
https://support.apple.com/kb/HT212321Third Party Advisory
https://support.apple.com/kb/HT212323Third Party Advisory
https://support.apple.com/kb/HT212324Third Party Advisory
https://support.apple.com/kb/HT212325Third Party Advisory

Timeline

Published: Mar 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7463?

How severe is CVE-2020-7463?

CVE-2020-7463 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7463?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7463?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST