CVE-2026-64524

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-64524

Key Details

CVE	CVE-2026-64524
CVSS Score / Version	7.7 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64524
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64524

Source

Reference

NVD

CVE