CVE-2025-21870
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 wid…
Impact
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
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.0 before 6.12.17 from 6.13 before 6.13.5 Version 6.14 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/6b6b47c1aa717a0ed3400e00a81dfea686a41d7f
- https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7ef
- https://git.kernel.org/stable/c/87c8768a96092ce75cd47fe076db5080db7ac515
- https://git.kernel.org/stable/c/93c6c2e5801aab09ef1ef99f248f3cd323c3f152
- https://git.kernel.org/stable/c/ec8f5a4fe296c311d4b45db7a25a0e9e69802372