Linux Kernel up to 6.12.104/6.18.45/7.1.9 ipc4-topology sof_ipc4_widget_setup state issue

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.30-

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.12.104/6.18.45/7.1.9. Affected by this vulnerability is the function sof_ipc4_widget_setup of the component ipc4-topology. Executing a manipulation can lead to state issue. The identification of this vulnerability is CVE-2026-80525. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.12.104/6.18.45/7.1.9 and classified as problematic. This vulnerability affects the function sof_ipc4_widget_setup of the component ipc4-topology. The manipulation with an unknown input leads to a state issue vulnerability. The CWE definition for the vulnerability is CWE-371. As an impact it is known to affect integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-topology: Refresh copier IPC payload before widget setup The ipc_config_data buffer for copier widgets is built once during ipc_prepare (called from sof_pcm_setup_connected_widgets) and cached for reuse. For host copiers this buffer contains the copier_data with gtw_cfg.node_id (host DMA ID). For DAI copiers it additionally includes a dma_config_tlv trailer with stream_id and dma_channel_id for HDA link DMA. On suspend/resume, both host and link DMA streams are released and re-allocated with potentially different stream tags. The underlying copier_data and dma_config_tlv structures are correctly updated by host_config and sdw_hda_dai_hw_params respectively. However, since the widget list (spcm->stream[].list) persists across suspend, sof_pcm_hw_params skips sof_pcm_setup_connected_widgets and ipc_prepare never runs again to rebuild ipc_config_data. The stale cached payload is then sent to firmware with boot-time DMA channel assignments, causing DMA channel conflicts that lead to firmware errors and crashes. Fix this by refreshing copier_data and dma_config_tlv portions of ipc_config_data in sof_ipc4_widget_setup right before the IPC message is sent. This ensures the payload always reflects the current DMA state regardless of whether ipc_prepare ran. For DAI copiers, the gtw_cfg.config_length in copier_data is temporarily inflated to include the TLV size (matching the ipc_config_data layout) before copying, then restored, mirroring what sof_ipc4_prepare_copier_module does when first building the buffer.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-80525 since 08/26/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/26/2026).

Upgrading to version 6.12.105, 6.18.46 or 7.1.10 eliminates this vulnerability. Applying the patch decb87e76716d11d846c9c055e309c8ff90d7656/2a7d8fc0fd50e7a2020989d9840cabb74c0282e3/574498e56024082a0da68474ad4526d250732411/0c0e418dbcf0582bf80d8dbfd9b306607c065992 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: State issue
CWE: CWE-371
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.105/6.18.46/7.1.10
Patch: decb87e76716d11d846c9c055e309c8ff90d7656/2a7d8fc0fd50e7a2020989d9840cabb74c0282e3/574498e56024082a0da68474ad4526d250732411/0c0e418dbcf0582bf80d8dbfd9b306607c065992

Timelineinfo

08/26/2026 Advisory disclosed
08/26/2026 +0 days CVE reserved
08/26/2026 +0 days VulDB entry created
08/26/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80525 (🔒)
GCVE (CVE): GCVE-0-2026-80525
GCVE (VulDB): GCVE-100-395824

Entryinfo

Created: 08/26/2026 17:20
Changes: 08/26/2026 17:20 (59)
Complete: 🔍
Cache ID: 216::103

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