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CVE-2024-36012

Disclosure Date: May 23, 2024
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Description

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(&msft->filter_lock); …(4) <– used after freed.

[free]
msft_unregister()
msft = hdev->msft_data;
hdev->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

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CVSS V3 Severity and Metrics
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Impact Score:
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General Information

Vendors

  • Linux

Products

  • Linux
Technical Analysis