CVE-2026-63991

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt() The skb_clone() function can return NULL if memory allocation fails. send_mcast_pkt() calls skb_clone() without checking the return value, which can lead to a NULL pointer dereference in send_pkt() when it dereferences skb->data. Add a NULL check after skb_clone() and skip the peer if the clone fails.

CVSS 3.1

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

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2026-07-19

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/2061d080a013c0ec0a56162cd501fb36d2befc26
• https://git.kernel.org/stable/c/3c40d381ce04f9575a5d8b542898183c3b4b38dc
• https://git.kernel.org/stable/c/3d5d81d294ba09487c86bc4ba33dc4a4bec5d215
• https://git.kernel.org/stable/c/9903a04becf059e44cccf625e23689b7d4378384
• https://git.kernel.org/stable/c/9afcb5ea080af13aab37930da627db43bd277665

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