CVE-2025-40301

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate skb length for unknown CC opcode In hci_cmd_complete_evt(), if the command complete event has an unknown opcode, we assume the first byte of the remaining skb->data contains the return status. However, parameter data has previously been pulled in hci_event_func(), which may leave the skb empty. If so, using skb->data[0] for the return status uses un-init memory. The fix is to check skb->len before using skb->data.

The following products are affected by CVE-2025-40301 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-40301.

URL	Resource
https://git.kernel.org/stable/c/1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50
https://git.kernel.org/stable/c/5c5f1f64681cc889d9b13e4a61285e9e029d6ab5
https://git.kernel.org/stable/c/779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8
https://git.kernel.org/stable/c/cf2c2acec1cf456c3d11c11a7589e886a0f963a9
https://git.kernel.org/stable/c/fea895de78d3bb2f0c09db9f10b18f8121b15759
https://lore.kernel.org/linux-cve-announce/2025120819-CVE-2025-40301-4d3b@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-40301
https://www.cve.org/CVERecord?id=CVE-2025-40301