| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-42141: Bluetooth: ISO: Check socket flag instead of hcon |
| |
| 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, |
| |
| The Linux kernel CVE team has assigned CVE-2024-42141 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit fbdc4bc47268953c80853489f696e02d61f9a2c6 and fixed in 6.6.39 with commit 045669710464a21c67e690ef14698fd71857cb11 |
| Issue introduced in 6.6 with commit fbdc4bc47268953c80853489f696e02d61f9a2c6 and fixed in 6.9.9 with commit 33fabef489169c6db87843ef23351ed0d5e51ad8 |
| Issue introduced in 6.6 with commit fbdc4bc47268953c80853489f696e02d61f9a2c6 and fixed in 6.10 with commit 596b6f081336e77764ca35cfeab66d0fcdbe544e |
| Issue introduced in 6.5.12 with commit c03a10bd5b6ccb22921e04bcddc987410df7e7a9 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-42141 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/bluetooth/iso.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/045669710464a21c67e690ef14698fd71857cb11 |
| https://git.kernel.org/stable/c/33fabef489169c6db87843ef23351ed0d5e51ad8 |
| https://git.kernel.org/stable/c/596b6f081336e77764ca35cfeab66d0fcdbe544e |
