CVE-2024-26886

Bluetooth: af_bluetooth: Fix deadlock

State: Published
Severity: 6.5 Medium
Published: Apr 17, 2024
Updated: Oct 30, 2026
Reserved: Feb 19, 2024

Description

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>

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	2b16d960c79abc397f102c3d23d30005b68cb036 to before 60673f442984fe689d4127a5dd4be414247b3d67Affected 37f71e2c9f515834841826f4eb68ec33cfb2a1ff to before 0309acebc4b3884bfda332558bb8a1df052f4f39Affected 1d576c3a5af850bf11fbd103f9ba11aa6d6061fb to before 64be3c6154886200708da0dfe259705fb992416cAffected 2e07e8348ea454615e268222ae3fc240421be768 to before 817e8138ce86001b2fa5c63d6ede756e205a01f7Affected 2e07e8348ea454615e268222ae3fc240421be768 to before 2c9e2df022ef8b9d7fac58a04a2ef4ed25288955Affected 2e07e8348ea454615e268222ae3fc240421be768 to before f7b94bdc1ec107c92262716b073b3e816d4784fbAffected db1b14eec8c61a20374de9f9c2ddc6c9406a8c42Affected 5.15.146 to before 5.15.209Affected 6.1.70 to before 6.1.191Affected 6.6.9 to before 6.6.23Affected 5.10.206 to before 5.11Affected
LinuxLinux	6.7Affected before 6.7Not affected 5.15.209 through 5.15.Not affected 6.1.191 through 6.1.Not affected 6.6.23 through 6.6.Not affected 6.7.11 through 6.7.Not affected 6.8.2 through 6.8.*Not affected 6.9 and laterNot affected

Product

Versions

LinuxLinux

2b16d960c79abc397f102c3d23d30005b68cb036 to before 60673f442984fe689d4127a5dd4be414247b3d67Affected
37f71e2c9f515834841826f4eb68ec33cfb2a1ff to before 0309acebc4b3884bfda332558bb8a1df052f4f39Affected
1d576c3a5af850bf11fbd103f9ba11aa6d6061fb to before 64be3c6154886200708da0dfe259705fb992416cAffected
2e07e8348ea454615e268222ae3fc240421be768 to before 817e8138ce86001b2fa5c63d6ede756e205a01f7Affected
2e07e8348ea454615e268222ae3fc240421be768 to before 2c9e2df022ef8b9d7fac58a04a2ef4ed25288955Affected
2e07e8348ea454615e268222ae3fc240421be768 to before f7b94bdc1ec107c92262716b073b3e816d4784fbAffected
db1b14eec8c61a20374de9f9c2ddc6c9406a8c42Affected
5.15.146 to before 5.15.209Affected
6.1.70 to before 6.1.191Affected
6.6.9 to before 6.6.23Affected
5.10.206 to before 5.11Affected

LinuxLinux

6.7Affected
before 6.7Not affected
5.15.209 through 5.15.*Not affected
6.1.191 through 6.1.*Not affected
6.6.23 through 6.6.*Not affected
6.7.11 through 6.7.*Not affected
6.8.2 through 6.8.*Not affected
6.9 and laterNot affected

References

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