CVE-2026-72304 ASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put
A time-of-check time-of-use race condition in the Linux kernel's SOF IPC4 control allows attackers to read stale data or corrupt memory via crafted audio control operations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72304?
CVE-2026-72304 is a high-severity vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-72304?
How do I fix CVE-2026-72304?
Apply the vendor's patch.
Is CVE-2026-72304 being exploited?
There is no known exploitation of CVE-2026-72304 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72304, DEBIAN-CVE-2026-72304, GHSA-p327-qw84-66rm, UBUNTU-CVE-2026-72304.