CVE-2026-80763

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: validate LE Set CIG Parameters response

The Command Complete dispatch validates only the fixed part of the LE Set

CIG Parameters response. After that part is pulled from the skb,

hci_cc_le_set_cig_params() trusts num_handles and reads each entry in the

trailing handle array.

Matching num_handles against the command's num_cis does not guarantee

that the response contains the advertised handles. A truncated response

from a malfunctioning controller can therefore make the handler read

beyond the skb data.

Validate that the remaining skb data contains all advertised handles.

Include this in the existing response validation so malformed responses

also follow the established CIG failure handling.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References