CVE-2024-36012
Assigner: Linux
Published: 2024-05-23T07:03:06.904Z
State: PUBLISHED
descriptions: value: 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
affected: product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: bf6a4e30ffbd
lessThan: e3880b531b68
status: affected
versionType: git
version: bf6a4e30ffbd
lessThan: a85a60e62355
status: affected
versionType: git
version: bf6a4e30ffbd
lessThan: 4f1de02de077
status: affected
versionType: git
version: bf6a4e30ffbd
lessThan: 10f9f426ac6e
status: affected
versionType: git
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: 5.12
status: affected
version: 0
lessThan: 5.12
status: unaffected
versionType: custom
version: 6.1.91
lessThanOrEqual: 6.1.*
status: unaffected
versionType: custom
version: 6.6.31
lessThanOrEqual: 6.6.*
status: unaffected
versionType: custom
version: 6.8.10
lessThanOrEqual: 6.8.*
status: unaffected
versionType: custom
version: 6.9
lessThanOrEqual: *
status: unaffected
versionType: original_commit_for_fix
title: Bluetooth: msft: fix slab-use-after-free in msft_do_close()
x_generator: engine: bippy-d175d3acf727