CVE-2025-21870ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from a150345aa758492e05d2934f318ce7c2566b1cfe before 87c8768a96092ce75cd47fe076db5080db7ac515; from a150345aa758492e05d2934f318ce7c2566b1cfe before 93c6c2e5801aab09ef1ef99f248f3cd323c3f152; from a150345aa758492e05d2934f318ce7c2566b1cfe before 6fd60136d256b3b948333ebdb3835f41a95ab7ef | CNA record |
linux linux_kernel linux:linux_kernel | from 6.0 before 6.12.17; from 6.13 before 6.13.5; 6.14; 6.14; 6.14 | NVD |
References
- https://git.kernel.org/stable/c/87c8768a96092ce75cd47fe076db5080db7ac515patch
- https://git.kernel.org/stable/c/93c6c2e5801aab09ef1ef99f248f3cd323c3f152patch
- https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7efpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.