# CVE-2026-68464: mmc: sdhci-esdhc-imx: disable irq during suspend to fix unhandled interrupt

> An unhandled interrupt in the sdhci-esdhc-imx driver during suspend/resume can cause a kernel warning and potential system instability.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** BELL-CVE-2026-68464, DEBIAN-CVE-2026-68464, GHSA-r869-x47v-qcm4, UBUNTU-CVE-2026-68464

## What is CVE-2026-68464?

CVE-2026-68464 is a denial of service 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:

mmc: sdhci-esdhc-imx: disable irq during suspend to fix unhandled interrupt

When using WIFI out-of-band wakeup, an "irq xxx: nobody cared" warning
occurs. This happens because the usdhc interrupt is not disabled during
system suspend when device_may_wakeup() returns false.

The sequence of events leading to this issue:
1. System enters suspend without disabling usdhc interrupt
(because device_may_wakeup() returns false for usdhc device)
2. WIFI out-of-band wakeup triggers system resume via GPIO interrupt
3. WIFI sends a Card interrupt before usdhc has fully resumed
4. usdhc is still in runtime suspend state and cannot handle the
interrupt properly
5. The unhandled interrupt triggers "nobody cared" warning

Fix this by unconditionally disabling the usdhc interrupt during suspend
and re-enabling it during resume, regardless of the wakeup capability.
This ensures no interrupts are processed during the suspend/resume
transition.

## Which versions are affected by CVE-2026-68464?


## How do I fix CVE-2026-68464?

Apply the vendor's patch.

## Is CVE-2026-68464 being exploited?

There is no known exploitation of CVE-2026-68464 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68464 and fix it if it is affected.

What it is: CVE-2026-68464 is a denial of service 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.
Exploitation: There is no known exploitation of CVE-2026-68464 in the wild and no public exploit code.

Affected product: Linux. 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-2026-68464/ (Markdown: https://insights.sbomify.com/CVE-2026-68464/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68464
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68464
- OSV: https://osv.dev/vulnerability/CVE-2026-68464

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-68464/
Summaries are generated and may contain mistakes; the official description above is the record.