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…
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/2061d080a013c0ec0a56162cd501fb36d2befc26Patch
- https://git.kernel.org/stable/c/3c40d381ce04f9575a5d8b542898183c3b4b38dcPatch
- https://git.kernel.org/stable/c/3d5d81d294ba09487c86bc4ba33dc4a4bec5d215Patch
- https://git.kernel.org/stable/c/9903a04becf059e44cccf625e23689b7d4378384Patch
- https://git.kernel.org/stable/c/9afcb5ea080af13aab37930da627db43bd277665Patch
- https://git.kernel.org/stable/c/b06203ac5f12929d79146bb9f063c2af1d679e63Patch
- https://git.kernel.org/stable/c/d630c4b25f36e0e68461561e4c70957ec37fdeddPatch
- https://git.kernel.org/stable/c/e673889a35a5e4c586d0fae67d8755ca4367d3e2Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.