CVE-2026-63991

MediumCVSS 5.5/10Last modified Oct 7, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 18722c247023035b9e2e2a08a887adec2a9a6e49, < 9afcb5ea080af13aab37930da627db43bd277665; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < 9903a04becf059e44cccf625e23689b7d4378384; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < d630c4b25f36e0e68461561e4c70957ec37fdedd; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < b06203ac5f12929d79146bb9f063c2af1d679e63; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < 3d5d81d294ba09487c86bc4ba33dc4a4bec5d215; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < e673889a35a5e4c586d0fae67d8755ca4367d3e2; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < 2061d080a013c0ec0a56162cd501fb36d2befc26; >= 18722c247023035b9e2e2a08a887adec2a9a6e49, < 3c40d381ce04f9575a5d8b542898183c3b4b38dc
LinuxLinux3.14

References

Timeline

Published
Jul 19, 2026
Last modified
Oct 7, 2026
NVD status
Analyzed

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CVE-2026-63991: Medium severity, CVSS 5.5 | Vulnix