CVEvulnerability

CVE-2021-22161

6.5 MEDIUM Published 2021-02-07 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-02-07
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
3.3 LOW — AV:A/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-835

Description

In OpenWrt 19.07.x before 19.07.7, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set. This affects the netifd and odhcp6c packages.

Affected configurations

• openwrt openwrt (>= 19.07.0 <= 19.07.6)

Related

Weakness · CWE (1)

  • CWE-835 Loop with Unreachable Exit Condition weakness

References