# CVE-2022-49200: linux: In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: btmtksdio: Fix kernel oops in btmtksd...

CVE-2022-49200 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49200, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49200
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: btmtksdio: Fix kernel oops in btmtksdio_interrupt  Fix the following kernel oops in btmtksdio_interrrupt  [   14.339134]  btmtksdio_interrupt+0x28/0x54 [   14.339139]  process_sdio_pending_irqs+0x68/0x1a0 [   14.339144]  sdio_irq_work+0x40/0x70 [   14.339154]  process_one_work+0x184/0x39c [   14.339160]  worker_thread+0x228/0x3e8 [   14.339168]  kthread+0x148/0x3ac [   14.339176]  ret_from_fork+0x10/0x30  That happened because hdev->power_on is already called before sdio_set_drvdata which btmtksdio_interrupt handler relies on is not properly set up.  The details are shown as the below: hci_register_dev would run queue_work(hdev->req_workqueue, &hdev->power_on) as WQ_HIGHPRI workqueue_struct to complete the power-on sequeunce and thus hci_power_on may run before sdio_set_drvdata is done in btmtksdio_probe.  The hci_dev_do_open in hci_power_on would initialize the device and enable the interrupt and thus it is possible that btmtksdio_interrupt is being called right before sdio_set_drvdata is filled out.  When btmtksdio_interrupt is being called and sdio_set_drvdata is not filled , the kernel oops is going to happen because btmtksdio_interrupt access an uninitialized pointer.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.3-1 | [DEBIAN-CVE-2022-49200](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49200.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.17.3-1 | [DEBIAN-CVE-2022-49200](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49200.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.17.3-1 | [DEBIAN-CVE-2022-49200](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49200.md) | Feb 26, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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