CVE-2024-42141

Bluetooth: ISO: Check socket flag instead of hcon

Published Jul 30, 2024 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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,
&pi->conn->hcon->flags)) {
1361 iso_conn_big_sync(sk);
1362 sk->sk_state = BT_LISTEN;
1363 } else {
--> 1364 iso_conn_defer_accept(pi->conn->hcon);
^^^^^^^^^^^^^^
then we're toast

1365 sk->sk_state = BT_CONFIG;
1366 }
1367 release_sock(sk);
1368 return 0;
1369 case BT_CONNECTED:
1370 if (test_bit(BT_SK_PA_SYNC,

Analysis

No analysis available yet

Remediation

No remediation available yet

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-7089-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-4 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-5 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-6 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7089-7 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-7090-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7095-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7156-1 Linux kernel (GKE) vulnerabilities
History
Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-476
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Linux
Published
Updated
May 23, 2026, 3:52 PM
Reserved
Jul 29, 2024, 3:50 PM
Status
Analyzed
Published
Jul 30, 2024, 8:15 AM
Modified
Jun 17, 2026, 7:48 AM
Severity
Low
Public date
Jul 30, 2024, 12:00 AM