Bug 2467236 (CVE-2025-71286)

Summary: CVE-2025-71286 kernel: ASoC: SOF: ipc4-topology: Correct the allocation size for bytes controls
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel, specifically within the Advanced Linux Sound Architecture (ALSA) Sound Open Firmware (SOF) `ipc4-topology` component. An incorrect calculation of memory allocation size for `bytes controls` can occur. This memory allocation error could lead to memory corruption, potentially allowing a local attacker to cause a denial of service, leading to system instability or a crash.
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Description OSIDB Bzimport 2026-05-06 13:12:22 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: SOF: ipc4-topology: Correct the allocation size for bytes controls

The size of the data behind of scontrol->ipc_control_data for bytes
controls is:
[1] sizeof(struct sof_ipc4_control_data) + // kernel only struct
[2] sizeof(struct sof_abi_hdr)) + payload

The max_size specifies the size of [2] and it is coming from topology.

Change the function to take this into account and allocate adequate amount
of memory behind scontrol->ipc_control_data.

With the change we will allocate [1] amount more memory to be able to hold
the full size of data.
Comment 1 Keith Grant 2026-05-06 16:42:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050630-CVE-2025-71286-9591@gregkh/T