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ubuntucveUbuntu.comUB:CVE-2024-26886
HistoryApr 17, 2024 - 12:00 a.m.

CVE-2024-26886

2024-04-1700:00:00
ubuntu.com
ubuntu.com
7
linux kernel
bluetooth
vulnerability
deadlock
af_bluetooth

AI Score

6.6

Confidence

High

EPSS

0

Percentile

15.5%

In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: af_bluetooth: Fix deadlock Attemting to do sock_lock on .recvmsg
may cause a deadlock as shown bellow, so instead of using sock_sock this
uses sk_receive_queue.lock on bt_sock_ioctl to avoid the UAF: INFO: task
kworker/u9:1:121 blocked for more than 30 seconds. Not tainted 6.7.6-lemon
#183 Workqueue: hci0 hci_rx_work Call Trace: <TASK> __schedule+0x37d/0xa00
schedule+0x32/0xe0 __lock_sock+0x68/0xa0 ?
__pfx_autoremove_wake_function+0x10/0x10 lock_sock_nested+0x43/0x50
l2cap_sock_recv_cb+0x21/0xa0 l2cap_recv_frame+0x55b/0x30a0 ?
psi_task_switch+0xeb/0x270 ? finish_task_switch.isra.0+0x93/0x2a0
hci_rx_work+0x33a/0x3f0 process_one_work+0x13a/0x2f0
worker_thread+0x2f0/0x410 ? __pfx_worker_thread+0x10/0x10
kthread+0xe0/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 ?
__pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>

References

AI Score

6.6

Confidence

High

EPSS

0

Percentile

15.5%