# CVE-2024-46793: ASoC: Intel: Boards: Fix NULL pointer deref in BYT/CHT boards harder

> A NULL pointer dereference in Intel ASoC board drivers can cause a kernel crash, leading to denial of service.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** Yes
- **Published:** 18 Sep 2024
- **Updated:** 11 May 2026
- **Also known as:** BELL-CVE-2024-46793, DEBIAN-CVE-2024-46793, GHSA-47fg-g734-5wff, UBUNTU-CVE-2024-46793

## What is CVE-2024-46793?

CVE-2024-46793 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 2024. 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: Intel: Boards: Fix NULL pointer deref in BYT/CHT boards harder

Since commit 13f58267cda3 ("ASoC: soc.h: don't create dummy Component
via COMP_DUMMY()") dummy codecs declared like this:

SND_SOC_DAILINK_DEF(dummy,
        DAILINK_COMP_ARRAY(COMP_DUMMY()));

expand to:

static struct snd_soc_dai_link_component dummy[] = {
};

Which means that dummy is a zero sized array and thus dais[i].codecs should
not be dereferenced *at all* since it points to the address of the next
variable stored in the data section as the "dummy" variable has an address
but no size, so even dereferencing dais[0] is already an out of bounds
array reference.

Which means that the if (dais[i].codecs->name) check added in
commit 7d99a70b6595 ("ASoC: Intel: Boards: Fix NULL pointer deref
in BYT/CHT boards") relies on that the part of the next variable which
the name member maps to just happens to be NULL.

Which apparently so far it usually is, except when it isn't
and then it results in crashes like this one:

[   28.795659] BUG: unable to handle page fault for address: 0000000000030011
...
[   28.795780] Call Trace:
[   28.795787]  <TASK>
...
[   28.795862]  ? strcmp+0x18/0x40
[   28.795872]  0xffffffffc150c605
[   28.795887]  platform_probe+0x40/0xa0
...
[   28.795979]  ? __pfx_init_module+0x10/0x10 [snd_soc_sst_bytcr_wm5102]

Really fix things this time around by checking dais.num_codecs != 0.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2024-46793?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2024-46793?

Apply the vendor's patch.

## Is CVE-2024-46793 being exploited?

There is no known exploitation of CVE-2024-46793 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-46793 and fix it if it is affected.

What it is: CVE-2024-46793 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-46793 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-46793/ (Markdown: https://insights.sbomify.com/CVE-2024-46793/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-46793
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-46793
- OSV: https://osv.dev/vulnerability/CVE-2024-46793

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-46793/
Summaries are generated and may contain mistakes; the official description above is the record.