What’s Vulnerable › Vulnerabilities

CVE-2026-72304: ASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put In sof_ipc4_bytes_put(), the copy size is derived from the old data->size in the buffer rather than the incoming new data's size field from ucontrol. If the new data has a different size, the copy uses the wrong length: it may truncate valid data or copy stale bytes. Fix by validating and using the incoming data's sof_abi_hdr.size from ucontrol before copying.

Affected products

• Linux kernel: 6.4 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/038406abde0d0883419ec89425ea941ec8bbef95
• https://git.kernel.org/stable/c/266f936db83aee6ca6473bbb06259bda52bf4fc3
• https://git.kernel.org/stable/c/3ad673e7139cf214afd24321a829aad6575f4163
• https://git.kernel.org/stable/c/4cf6a7ebbf8787393b158b2cc341723e5bebc4a8
• https://git.kernel.org/stable/c/fb4293173db2d474d8fbc0e5ecf4943e6df2b40e

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