VYPR
Unrated severityNVD Advisory· Published Dec 8, 2025· Updated Apr 15, 2026

CVE-2025-40301

CVE-2025-40301

Description

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.

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Affected products

179

Patches

Vulnerability mechanics

References

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