Answer in brief
CVE-2025-21870 records a High severity (CVSS 7.8) vulnerability in ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a150345aa758492e05d2934f318ce7c2566b1cfe <87c8768a96092ce75cd47fe076db5080db7ac515 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <93c6c2e5801aab09ef1ef99f248f3cd323c3f152 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <6fd60136d256b3b948333ebdb3835f41a95ab7ef | 87c8768a96092ce75cd47fe076db5080db7ac515, 93c6c2e5801aab09ef1ef99f248f3cd323c3f152, 6fd60136d256b3b948333ebdb3835f41a95ab7ef |
| Linux/Linuxgeneric | 6.0 | Not reported |
| Linux/Linuxgeneric | >=a150345aa758492e05d2934f318ce7c2566b1cfe <6b6b47c1aa717a0ed3400e00a81dfea686a41d7f || >=a150345aa758492e05d2934f318ce7c2566b1cfe <87c8768a96092ce75cd47fe076db5080db7ac515 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <93c6c2e5801aab09ef1ef99f248f3cd323c3f152 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <6fd60136d256b3b948333ebdb3835f41a95ab7ef | 6b6b47c1aa717a0ed3400e00a81dfea686a41d7f, 87c8768a96092ce75cd47fe076db5080db7ac515, 93c6c2e5801aab09ef1ef99f248f3cd323c3f152, 6fd60136d256b3b948333ebdb3835f41a95ab7ef |
| Linux/Linuxgeneric | >=a150345aa758492e05d2934f318ce7c2566b1cfe <ec8f5a4fe296c311d4b45db7a25a0e9e69802372 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <6b6b47c1aa717a0ed3400e00a81dfea686a41d7f || >=a150345aa758492e05d2934f318ce7c2566b1cfe <87c8768a96092ce75cd47fe076db5080db7ac515 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <93c6c2e5801aab09ef1ef99f248f3cd323c3f152 || >=a150345aa758492e05d2934f318ce7c2566b1cfe <6fd60136d256b3b948333ebdb3835f41a95ab7ef | ec8f5a4fe296c311d4b45db7a25a0e9e69802372, 6b6b47c1aa717a0ed3400e00a81dfea686a41d7f, 87c8768a96092ce75cd47fe076db5080db7ac515, 93c6c2e5801aab09ef1ef99f248f3cd323c3f152, 6fd60136d256b3b948333ebdb3835f41a95ab7ef |
Published upstream
Mar 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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
Quoted source text, attributed separately from HOL analysis.