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Bluetooth: hci_event: validate LE Set CIG Parameters response

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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.

Fixes: 26afbd826e ("Bluetooth: Add initial implementation of CIS connections")
Cc: stable@vger.kernel.org
Signed-off-by: Laxman Acharya Padhya <acharyalaxman8848@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Laxman Acharya Padhya
2026-08-01 23:54:52 +05:45
committed by Luiz Augusto von Dentz
parent bd76a28a73
commit 0acd4eeb4b
1 changed files with 4 additions and 2 deletions
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6
net/bluetooth/hci_event.c
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@@ -3865,8 +3865,10 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
rp->cig_id != cp->cig_id)) {
if (!rp->status &&
(!cp || rp->num_handles != cp->num_cis ||
rp->cig_id != cp->cig_id ||
skb->len < array_size(rp->num_handles, sizeof(*rp->handle)))) {
bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
status = HCI_ERROR_UNSPECIFIED;
}