CVE-2026-63991

A flaw was found in the Linux kernel's Bluetooth 6lowpan module. This vulnerability occurs because the send_mcast_pkt() function does not properly check the return value of skb_clone(), which can be null if memory allocation fails. An attacker could exploit this by triggering a scenario where skb_clone() returns null, leading to a null pointer dereference. This can result in a system crash, causing a denial of service (DoS).

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.