CVE-2024-44962

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: btnxpuart: Shutdown timer and prevent rearming when driver unloading

When unload the btnxpuart driver, its associated timer will be deleted.

If the timer happens to be modified at this moment, it leads to the

kernel call this timer even after the driver unloaded, resulting in

kernel panic.

Use timer_shutdown_sync() instead of del_timer_sync() to prevent rearming.

panic log:

Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP

Modules linked in: algif_hash algif_skcipher af_alg moal(O) mlan(O) crct10dif_ce polyval_ce polyval_generic snd_soc_imx_card snd_soc_fsl_asoc_card snd_soc_imx_audmux mxc_jpeg_encdec v4l2_jpeg snd_soc_wm8962 snd_soc_fsl_micfil snd_soc_fsl_sai flexcan snd_soc_fsl_utils ap130x rpmsg_ctrl imx_pcm_dma can_dev rpmsg_char pwm_fan fuse [last unloaded: btnxpuart]

CPU: 5 PID: 723 Comm: memtester Tainted: G O 6.6.23-lts-next-06207-g4aef2658ac28 #1

Hardware name:

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References