摘要:

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

Bluetooth: msft: fix slab-use-after-free in msft_do_close()

Tying the msft->data lifetime to hdev by freeing it in
hci_release_dev() to fix the following case:

[use]
msft_do_close()
msft = hdev->msft_data;
if (!msft) ...(1) <- passed.
return;
mutex_lock(&amp;msft-&gt;filter_lock); ...(4) <- used after freed.

[free]
msft_unregister()
msft = hdev-&gt;msft_data;
hdev-&gt;msft_data = NULL; ...(2)
kfree(msft); ...(3) <- msft is freed.

==================================================================
BUG: KASAN: slab-use-after-free in __mutex_lock_common
kernel/locking/mutex.c:587 [inline]
BUG: KASAN: slab-use-after-free in __mutex_lock+0x8f/0xc30
kernel/locking/mutex.c:752
Read of size 8 at addr ffff888106cbbca8 by task kworker/u5:2/309

安全等级: Low

公告ID: KylinSec-SA-2024-2656

发布日期: 2024年6月7日

关联CVE: CVE-2024-36012