CVE-2024-42141

/// Technical description

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

Bluetooth: ISO: Check socket flag instead of hcon

This fixes the following Smatch static checker warning:

net/bluetooth/iso.c:1364 iso_sock_recvmsg()

error: we previously assumed 'pi->conn->hcon' could be null (line 1359)

net/bluetooth/iso.c

1347 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,

1348 size_t len, int flags)

1349 {

1350 struct sock *sk = sock->sk;

1351 struct iso_pinfo *pi = iso_pi(sk);

1352

1353 BT_DBG("sk %p", sk);

1354

1355 if (test_and_clear_bit(BT_SK_DEFER_SETUP,

&bt_sk(sk)->flags)) {

1356 lock_sock(sk);

1357 switch (sk->sk_state) {

1358 case BT_CONNECT2:

1359 if (pi->conn->hcon &&

^^^^^^^^^^^^^^ If ->hcon is NULL

1360 test_bit(HCI_CONN_PA_SYNC,

/// 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