# CVE-2026-64171: i2c: tegra: fix pm_runtime leak on mutex_lock failure

> A resource leak in the Tegra I2C driver prevents devices from suspending, potentially causing battery drain or resource exhaustion.

- **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:** 19 Jul 2026
- **Updated:** 19 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-64171, GHSA-5qc2-5c25-4m38, UBUNTU-CVE-2026-64171

## What is CVE-2026-64171?

CVE-2026-64171 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 Jul 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:

i2c: tegra: fix pm_runtime leak on mutex_lock failure

If tegra_i2c_mutex_lock() fails, the function returns without calling
pm_runtime_put(), leaking the runtime PM reference acquired by the
preceding pm_runtime_get_sync(). This prevents the device from ever
entering runtime suspend.

Add the missing pm_runtime_put() before returning on lock failure.

Weakness: CWE-667 (Improper Locking)

## Which versions are affected by CVE-2026-64171?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-64171?

Apply the vendor's patch.

## Is CVE-2026-64171 being exploited?

There is no known exploitation of CVE-2026-64171 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-2026-64171 and fix it if it is affected.

What it is: CVE-2026-64171 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 Jul 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-2026-64171 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-2026-64171/ (Markdown: https://insights.sbomify.com/CVE-2026-64171/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-64171
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-64171
- OSV: https://osv.dev/vulnerability/CVE-2026-64171

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-64171/
Summaries are generated and may contain mistakes; the official description above is the record.