# CVE-2026-64519 — Linux

> As of 2026-07-25, CVE-2026-64519 is a vulnerability in Linux, EPSS 0.1% (6.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-64519 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-2026-64519?

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix infinite loop in layout state revocation find_one_sb_stid() skips stids whose sc_status is non-zero, but the SC_TYPE_LAYOUT case in nfsd4_revoke_states() never sets sc_status before calling nfsd4_close_layout(). The retry loop therefore finds the same layout stid on every iteration, hanging the revoker indefinitely.

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 6.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-25

## Is CVE-2026-64519 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-2026-64519

No vendor patch reference has been recorded for CVE-2026-64519 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-2026-64519

No threat campaign in the Threadlinqs corpus currently references CVE-2026-64519, 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/d1fc00ec02e9deb3f8d2bd59caf938c554fbc576)
- [git.kernel.org (fe59ae27d7346245f5d8d97220f374e63efd28b5)](https://git.kernel.org/stable/c/fe59ae27d7346245f5d8d97220f374e63efd28b5)
- [git.kernel.org (44e5e4eb3a07bf3e1d931dd9f96f3edcfa376605)](https://git.kernel.org/stable/c/44e5e4eb3a07bf3e1d931dd9f96f3edcfa376605)
- [git.kernel.org (4f8ef58c10bfe5f86a643c7c8331b37e69e3dae1)](https://git.kernel.org/stable/c/4f8ef58c10bfe5f86a643c7c8331b37e69e3dae1)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-64519
Full detection coverage and IOCs for threats exploiting CVE-2026-64519 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp