Vulnerability Description
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.
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
- https://git.kernel.org/stable/c/b06203ac5f12929d79146bb9f063c2af1d679e63
- https://git.kernel.org/stable/c/d630c4b25f36e0e68461561e4c70957ec37fdedd
- https://git.kernel.org/stable/c/e673889a35a5e4c586d0fae67d8755ca4367d3e2
FAQ
What is CVE-2026-63991?
CVE-2026-63991 is a documented vulnerability. 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 allocati...
How severe is CVE-2026-63991?
CVSS scoring is not yet available for CVE-2026-63991. Check NVD for updates.
Is there a patch for CVE-2026-63991?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.