CVE-2025-21870

ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers Other, non DAI copier widgets could have the same stream name (sname) as the ALH copier and in that case the copier->data is NULL, no alh_data is attached, which could lead to NULL pointer dereference. We could check for this NULL pointer in sof_ipc4_prepare_copier_module() and avoid the crash, but a similar loop in sof_ipc4_widget_setup_comp_dai() will miscalculate the ALH device count, causing broken audio. The correct fix is to harden the matching logic by making sure that the 1. widget is a DAI widget - so dai = w->private is valid 2. the dai (and thus the copier) is ALH copier

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/87c8768a96092ce75cd47fe076db5080db7ac515
https://git.kernel.org/stable/c/93c6c2e5801aab09ef1ef99f248f3cd323c3f152
https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7ef

Frequently Asked Questions

What is the severity of CVE-2025-21870?: CVE-2025-21870 has not yet been assigned a CVSS score.
How to fix CVE-2025-21870?: To fix CVE-2025-21870, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21870 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-21870 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21870?: CVE-2025-21870 affects Linux Linux, Linux Linux.

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