CVE-2026-72321

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description Memory leaks can occur in the IPv4 IGMP implementation within the igmp mod timer() and igmp stop timer() functions. The issue arises when these functions are called from the RCU (Read-Copy-Update) reader path and the multicast list entry im is concurrently removed by ip mc dec group(). In such cases, the use of refcount dec() to decrement the reference counter of the im structure fails to free the object when the count reaches zero, leading to a memory leak.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.