CVE-2024-50292: ASoC: stm32: spdifrx: fix dma channel release in stm32_spdifrx_remove

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-19 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: stm32: spdifrx: fix dma channel release in stm32_spdifrx_remove In case of error when requesting ctrl_chan DMA channel, ctrl_chan is not null. So the release of the dma channel leads to the following issue: [ 4.879000] st,stm32-spdifrx 500d0000.audio-controller: dma_request_slave_channel error -19 [ 4.888975] Unable to handle kernel NULL pointer dereference at virtual address 000000000000003d [...] [ 5.096577] Call trace: [ 5.099099] dma_release_channel+0x24/0x100 [ 5.103235] stm32_spdifrx_remove+0x24/0x60 [snd_soc_stm32_spdifrx] [ 5.109494] stm32_spdifrx_probe+0x320/0x4c4 [snd_soc_stm32_spdifrx] To avoid this issue, release channel only if the pointer is valid.

Affected products

Linux kernel: from 5.7 before 5.10.230; from 5.11 before 5.15.172; from 5.16 before 6.1.117; from 6.2 before 6.6.61; from 6.7 before 6.11.8; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4, 6.12-rc5, 6.12-rc6 — fixed in 5.10.230, 5.15.172, 6.1.117, 6.11.8, 6.6.61

How to fix

Upgrade to a fixed version: Linux kernel 5.10.230, 5.15.172, 6.1.117, 6.11.8. Check the vendor advisory for mitigations.

References

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