Bug 2516415 (CVE-2026-72302)

Summary: CVE-2026-72302 kernel: ASoC: SOF: ipc3-control: Use overflow checks in control_update size calc
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel, specifically within the ASoC Sound Open Firmware (SOF) component. An integer overflow vulnerability exists in the `sof_ipc3_control_update()` function when calculating an expected size based on firmware-provided data on 32-bit systems. This flaw can lead to memory corruption, where the system attempts to write data beyond its allocated buffer. Such an issue could potentially allow a local attacker to gain elevated privileges or cause the system to crash, leading to a denial of service.
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Description OSIDB Bzimport 2026-08-15 06:11:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: SOF: ipc3-control: Use overflow checks in control_update size calc

In sof_ipc3_control_update(), the expected_size calculation uses
firmware-provided cdata->num_elems in arithmetic that could overflow
on 32-bit platforms, wrapping to a small value. This would allow the
cdata->rhdr.hdr.size comparison to pass with mismatched sizes,
potentially leading to out-of-bounds access in snd_sof_update_control.

Use check_mul_overflow() and check_add_overflow() to detect and reject
overflowed size calculations.
Comment 1 Keith Grant 2026-08-18 19:45:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-72302-7b7f@gregkh/T