# CVE-2026-64521 — Linux

> As of 2026-07-25, CVE-2026-64521 is a vulnerability in Linux, EPSS 0.1% (6.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-64521 as of 2026-07-25; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-25

## What is CVE-2026-64521?

In the Linux kernel, the following vulnerability has been resolved: pinctrl: meson: amlogic-a4: fix deadlock issue Accessing the pinconf-pins sysfs node may deadlock. pinconf_pins_show() holds pctldev->mutex, and the platform driver calls pinctrl_find_gpio_range_from_pin(), which tries to acquire the same mutex again, leading to a deadlock. Use pinctrl_find_gpio_range_from_pin_nolock() to fix this issue.

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 72 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 6.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-25

## Is CVE-2026-64521 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Linux](https://intel.threadlinqs.com/vendors/linux): Linux

## How to fix CVE-2026-64521

No vendor patch reference has been recorded for CVE-2026-64521 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-64521

No threat campaign in the Threadlinqs corpus currently references CVE-2026-64521, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-26. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [git.kernel.org](https://git.kernel.org/stable/c/e917713f013423069782ff554935c7a5d4266783)
- [git.kernel.org (744ac926c0e55267a10b49b5b72582afef4ad49f)](https://git.kernel.org/stable/c/744ac926c0e55267a10b49b5b72582afef4ad49f)
- [git.kernel.org (e72ce029810390eb987a036fb2c8a5da9a23b685)](https://git.kernel.org/stable/c/e72ce029810390eb987a036fb2c8a5da9a23b685)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-64521
Full detection coverage and IOCs for threats exploiting CVE-2026-64521 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp