CVE-2022-48910
kernel: net: ipv6: ensure we call ipv6_mc_down() at most once
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 22, 2024
Updated · November 21, 2025
Description
A vulnerability was found in the Linux kernel’s IPv6 networking code. This flaw caused memory leaks by repeatedly calling ipv6_mc_down() when a network interface toggled between states without corresponding ipv6_mc_up() calls. This happens if either the network interface goes down or IPv6 is disabled, leading to leaks of struct ifmcaddr6 objects for subscribed multicast groups.
Statement
This issue is marked as Moderate with "not affected" for Red Hat Enterprise Linux, as it is not vulnerable to this CVE. This is because the CVE does not impact the versions or configurations of the Linux kernel used in Red Hat's distributions. Additionally, some RHEL versions may be marked as "will not fix" due to the minimal impact of the issue, and no fix will be provided.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime