CVE-2020-7462

Published: Mar 26, 2021Modified: Nov 21, 2024

5.5

Vector

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

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.

Affected (14)

Products: Freebsd: Freebsd

Freebsd

1 product

Freebsd

Configuration A

14 vulnerable

Vulnerable Software	Affected Versions
Freebsd Freebsd	Version 11.3
Freebsd Freebsd	Version 11.3 p10
Freebsd Freebsd	Version 11.3 p11
Freebsd Freebsd	Version 11.3 p12
Freebsd Freebsd	Version 11.3 p1
Freebsd Freebsd	Version 11.3 p2
Freebsd Freebsd	Version 11.3 p3
Freebsd Freebsd	Version 11.3 p4
Freebsd Freebsd	Version 11.3 p5
Freebsd Freebsd	Version 11.3 p6
Freebsd Freebsd	Version 11.3 p7
Freebsd Freebsd	Version 11.3 p8
Freebsd Freebsd	Version 11.3 p9
Freebsd Freebsd	Version 11.4

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (2)

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:24.ipv6.asc

Source: secteam@freebsd.org

Vendor Advisory

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:24.ipv6.asc

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.