CVE-2026-63991 Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt()

🗓️ 19 Jul 2026 14:56:11Reported by GoogleType

osv

osv🔗 osv.dev👁 3 Views

Fixed null pointer dereference by checking skb_clone() in send_mcast_pkt and skipping the peer when clone fails.

Reporter	Title	Published	Views	Family All 8
CVE	CVE-2026-63991	19 Jul 202614:56	–	cve
Cvelist	CVE-2026-63991 Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt()	19 Jul 202614:56	–	cvelist
EUVD	EUVD-2026-45564	19 Jul 202614:56	–	euvd
NVD	CVE-2026-63991	19 Jul 202616:17	–	nvd
OSV	DEBIAN-CVE-2026-63991	19 Jul 202616:17	–	osv
OSV	UBUNTU-CVE-2026-63991	20 Jul 202600:00	–	osv
Positive Technologies	PT-2026-61308	19 Jul 202600:00	–	ptsecurity
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-63991	20 Jul 202600:00	–	nessus

Source	Link
git	www.git.kernel.org/stable/c/2061d080a013c0ec0a56162cd501fb36d2befc26
git	www.git.kernel.org/stable/c/3c40d381ce04f9575a5d8b542898183c3b4b38dc
git	www.git.kernel.org/stable/c/3d5d81d294ba09487c86bc4ba33dc4a4bec5d215
git	www.git.kernel.org/stable/c/9903a04becf059e44cccf625e23689b7d4378384
git	www.git.kernel.org/stable/c/9afcb5ea080af13aab37930da627db43bd277665
git	www.git.kernel.org/stable/c/b06203ac5f12929d79146bb9f063c2af1d679e63
git	www.git.kernel.org/stable/c/d630c4b25f36e0e68461561e4c70957ec37fdedd
git	www.git.kernel.org/stable/c/e673889a35a5e4c586d0fae67d8755ca4367d3e2
github	www.github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63991.json
nvd	www.nvd.nist.gov/vuln/detail/CVE-2026-63991

21 Jul 2026 03:47Current

5.3Medium risk

Vulners AI Score5.3

EPSS0.00176

Bluetooth sixlowpan memory allocation failure clone check send multicast packet skb_clone kernel safety