CVE-2025-21334CISA KEV
Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability
Severity unknownCVSS unknownCheck the vendor advisory for fixed versions
CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.
CISA catalog record
Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.
- Product
- Windows
- Added to KEV
- 14 Jan 2025
- Federal remediation due
- 4 Feb 2025
- Known ransomware use
- Not reported
Page history
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
Cite this versionField-level log (2)
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- 23 Oct 2026 · 09:33:49 UTC
Source coverage: cisa-kevIncomplete → Current
- 23 Oct 2026 · 08:31:50 UTC
Source coverage: cisa-kevCurrent → Incomplete
Explore global source statements, affected packages and advisory history for CVE-2025-21334. The catalog has a separate collection scope from Microsoft release records.
More advisories, affected versions and source history
cve-program · CVE-2025-21334
PublishedWindows 10 Version 21H2
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 10 Version 21H2",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.19044.0",
"lessThan": "10.0.19044.5371",
"versionType": "custom",
"status": "affected"
}
]
}Windows 10 Version 22H2
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 10 Version 22H2",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.19045.0",
"lessThan": "10.0.19045.5371",
"versionType": "custom",
"status": "affected"
}
]
}Windows 11 version 22H2
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 11 version 22H2",
"platforms": [
"ARM64-based Systems",
"x64-based Systems"
],
"versions": [
{
"version": "10.0.22621.0",
"lessThan": "10.0.22621.4751",
"versionType": "custom",
"status": "affected"
}
]
}Windows 11 version 22H3
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 11 version 22H3",
"platforms": [
"ARM64-based Systems"
],
"versions": [
{
"version": "10.0.22631.0",
"lessThan": "10.0.22631.4751",
"versionType": "custom",
"status": "affected"
}
]
}Windows 11 Version 23H2
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 11 Version 23H2",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.22631.0",
"lessThan": "10.0.22631.4751",
"versionType": "custom",
"status": "affected"
}
]
}Windows 11 Version 24H2
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows 11 Version 24H2",
"platforms": [
"ARM64-based Systems",
"x64-based Systems"
],
"versions": [
{
"version": "10.0.26100.0",
"lessThan": "10.0.26100.2894",
"versionType": "custom",
"status": "affected"
}
]
}Windows Server 2022, 23H2 Edition (Server Core installation)
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.25398.0",
"lessThan": "10.0.25398.1369",
"versionType": "custom",
"status": "affected"
}
]
}Windows Server 2025
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows Server 2025",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.26100.0",
"lessThan": "10.0.26100.2894",
"versionType": "custom",
"status": "affected"
}
]
}Windows Server 2025 (Server Core installation)
Vendor product
Publisher's version information
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "Microsoft",
"product": "Windows Server 2025 (Server Core installation)",
"platforms": [
"x64-based Systems"
],
"versions": [
{
"version": "10.0.26100.0",
"lessThan": "10.0.26100.2894",
"versionType": "custom",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON