# CVE-2026-64524 — Linux

> As of 2026-07-25, CVE-2026-64524 is a vulnerability in Linux, EPSS 0.1% (6.8th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-64524 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-2026-64524?

In the Linux kernel, the following vulnerability has been resolved: drm/hyperv: validate resolution_count and fix WIN8 fallback A SYNTHVID_RESOLUTION_RESPONSE with resolution_count > 64 walks past the supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT] array in the parse loop. Bound resolution_count against the array size, folded into the existing zero-check. When the WIN10 resolution probe fails, the caller in hyperv_connect_vsp() left hv->screen_*_max / preferred_* unpopulated, which sets mode_config.max_width / max_height to 0 and makes drm_internal_framebuffer_create() reject every userspace framebuffer with -EINVAL. The pre-WIN10 branch had the same gap for preferred_width / preferred_height. Use a single post-probe fallback guarded by screen_width_max == 0 so both paths converge on the WIN8 defaults.

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 6.8% 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-2026-64524 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-2026-64524

No vendor patch reference has been recorded for CVE-2026-64524 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-2026-64524

No threat campaign in the Threadlinqs corpus currently references CVE-2026-64524, 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. 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/96f7de3172d4aa878b7f87173b2b3507c350fcd6)
- [git.kernel.org (bc573752f3dac0d1ab8df7078c1851bc76717653)](https://git.kernel.org/stable/c/bc573752f3dac0d1ab8df7078c1851bc76717653)
- [git.kernel.org (1fb565b77b8f44afabb02de6310065f109d89e94)](https://git.kernel.org/stable/c/1fb565b77b8f44afabb02de6310065f109d89e94)
- [git.kernel.org (a321c908f2eeea01539668eb270d074d9b88e490)](https://git.kernel.org/stable/c/a321c908f2eeea01539668eb270d074d9b88e490)
- [git.kernel.org (9c698b2c43c2667c34f5336bf46ad5786216ac2a)](https://git.kernel.org/stable/c/9c698b2c43c2667c34f5336bf46ad5786216ac2a)

_Showing 5 of 7 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-64524
Full detection coverage and IOCs for threats exploiting CVE-2026-64524 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp