CVE-2026-72321

kernel: ipv4: igmp: Fix potential memory leaks in igmp_mod_timer() and igmp_stop_timer()

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 15, 2026

Updated · August 19, 2026

Description

A flaw was found in the Linux kernel's IPv4 Internet Group Management Protocol (IGMP) component. Incorrect handling of reference counts in the igmp_mod_timer() and igmp_stop_timer() functions can occur when a multicast list entry is concurrently removed. This can lead to a memory leak of the im structure, potentially impacting system stability.

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

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-911 · Improper Update of Reference Count