CVE-2024-53238 Bluetooth: btmtk: adjust the position to init iso data anchor
A null pointer dereference in the Linux kernel Bluetooth driver causes a crash during unexpected USB disconnection, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-53238?
CVE-2024-53238 is a medium-severity vulnerability in Linux kernel, published on 27 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btmtk: adjust the position to init iso data anchor
MediaTek iso data anchor init should be moved to where MediaTek claims iso data interface. If there is an unexpected BT usb disconnect during setup flow, it will cause a NULL pointer crash issue when releasing iso anchor since the anchor wasn't been init yet. Adjust the position to do iso data anchor init.
[ 17.137991] pc : usb_kill_anchored_urbs+0x60/0x168 [ 17.137998] lr : usb_kill_anchored_urbs+0x44/0x168 [ 17.137999] sp : ffffffc0890cb5f0 [ 17.138000] x29: ffffffc0890cb5f0 x28: ffffff80bb6c2e80 [ 17.144081] gpio gpiochip0: registered chardev handle for 1 lines [ 17.148421] x27: 0000000000000000 [ 17.148422] x26: ffffffd301ff4298 x25: 0000000000000003 x24: 00000000000000f0 [ 17.148424] x23: 0000000000000000 x22: 00000000ffffffff x21: 0000000000000001 [ 17.148425] x20: ffffffffffffffd8 x19: ffffff80c0f25560 x18: 0000000000000000 [ 17.148427] x17: ffffffd33864e408 x16: ffffffd33808f7c8 x15: 0000000000200000 [ 17.232789] x14: e0cd73cf80ffffff x13: 50f2137c0a0338c9 x12: 0000000000000001 [ 17.239912] x11: 0000000080150011 x10: 0000000000000002 x9 : 0000000000000001 [ 17.247035] x8 : 0000000000000000 x7 : 0000000000008080 x6 : 8080000000000000 [ 17.254158] x5 : ffffffd33808ebc0 x4 : fffffffe033dcf20 x3 : 0000000080150011 [ 17.261281] x2 : ffffff8087a91400 x1 : 0000000000000000 x0 : ffffff80c0f25588 [ 17.268404] Call trace: [ 17.270841] usb_kill_anchored_urbs+0x60/0x168 [ 17.275274] btusb_mtk_release_iso_intf+0x2c/0xd8 [btusb (HASH:5afe 6)] [ 17.284226] btusb_mtk_disconnect+0x14/0x28 [btusb (HASH:5afe 6)] [ 17.292652] btusb_disconnect+0x70/0x140 [btusb (HASH:5afe 6)] [ 17.300818] usb_unbind_interface+0xc4/0x240 [ 17.305079] device_release_driver_internal+0x18c/0x258 [ 17.310296] device_release_driver+0x1c/0x30 [ 17.314557] bus_remove_device+0x140/0x160 [ 17.318643] device_del+0x1c0/0x330 [ 17.322121] usb_disable_device+0x80/0x180 [ 17.326207] usb_disconnect+0xec/0x300 [ 17.329948] hub_quiesce+0x80/0xd0 [ 17.333339] hub_disconnect+0x44/0x190 [ 17.337078] usb_unbind_interface+0xc4/0x240 [ 17.341337] device_release_driver_internal+0x18c/0x258 [ 17.346551] device_release_driver+0x1c/0x30 [ 17.350810] usb_driver_release_interface+0x70/0x88 [ 17.355677] proc_ioctl+0x13c/0x228 [ 17.359157] proc_ioctl_default+0x50/0x80 [ 17.363155] usbdev_ioctl+0x830/0xd08 [ 17.366808] __arm64_sys_ioctl+0x94/0xd0 [ 17.370723] invoke_syscall+0x6c/0xf8 [ 17.374377] el0_svc_common+0x84/0xe0 [ 17.378030] do_el0_svc+0x20/0x30 [ 17.381334] el0_svc+0x34/0x60 [ 17.384382] el0t_64_sync_handler+0x88/0xf0 [ 17.388554] el0t_64_sync+0x180/0x188 [ 17.392208] Code: f9400677 f100a2f4 54fffea0 d503201f (b8350288) [ 17.398289] ---[ end trace 0000000000000000 ]---
Weakness: CWE-476
Which versions are affected by CVE-2024-53238?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53238?
Apply the vendor's patch.
Is CVE-2024-53238 being exploited?
There is no known exploitation of CVE-2024-53238 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-53238, DEBIAN-CVE-2024-53238, GHSA-89vj-8q5m-mj67, UBUNTU-CVE-2024-53238.