CVE-2024-21338: Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability

Published Feb 13, 2024
·
Updated

Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation.

Other sources

Windows Kernel Elevation of Privilege Vulnerability

— Microsoft

Credit

E1 Coders

Affected Software

30 affected componentsFixes available
Microsoft Windows
Microsoft Windows 10 1809<10.0.17763.5458
Microsoft Windows 10 21h2<10.0.19044.4046
Microsoft Windows 10 22h2<10.0.19045.4046
Microsoft Windows 11 21h2<10.0.22000.2777
Microsoft Windows 11 22h2<10.0.22621.3155
Microsoft Windows 11 23h2<10.0.22631.3155
Microsoft Windows Server 2019<10.0.17763.5458
Microsoft Windows Server 2022<10.0.20348.2322
Microsoft Windows Server 2022 23h2<=10.0.25398.709
Microsoft Windows 10=22H2
10.0.19045.4046
Microsoft Windows 11=23H2
10.0.22631.3155
Microsoft Windows 11=22H2
10.0.22621.3155
Microsoft Windows 10=22H2
10.0.19045.4046
Microsoft Windows Server 2022, 23H2 Edition<10.0.25398.709
10.0.25398.709
Microsoft Windows 11=23H2
10.0.22631.3155
Microsoft Windows 10=21H2
10.0.19044.4046
Microsoft Windows 11=21H2
10.0.22000.2777
Microsoft Windows 11=21H2
10.0.22000.2777
Microsoft Windows 10=21H2
10.0.19044.4046
Microsoft Windows 10=21H2
10.0.19044.4046
Microsoft Windows 10=22H2
10.0.19045.4046
Microsoft Windows 10=1809
10.0.17763.5458
Microsoft Windows Server 2022<10.0.20348.2322
10.0.20348.2322
Microsoft Windows 11=22H2
10.0.22621.3155
Microsoft Windows Server 2019<10.0.17763.5458
10.0.17763.5458
Microsoft Windows 10=1809
10.0.17763.5458
Microsoft Windows Server 2022<10.0.20348.2322
10.0.20348.2322
Microsoft Windows Server 2019<10.0.17763.5458
10.0.17763.5458
Microsoft Windows 10=1809
10.0.17763.5458

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19045.4046Patch KB5034763
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22631.3155Patch KB5034765
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22621.3155Patch KB5034765
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.25398.709Patch KB5034769
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19044.4046Patch KB5034763
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22000.2777Patch KB5034766
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.17763.5458Patch KB5034768
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.20348.2322Patch KB5034770

Event History

Feb 13, 2024
CVE Published
via Microsoft·08:00 AM
Known Exploited
via Microsoft·08:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:00 AM
Affected Software
Updated
via Microsoft·08:00 AM
Affected Software
Updated
via Microsoft·08:00 AM
Description
CVE Published
via MITRE·06:02 PM
Data Sourced
via MITRE·06:02 PM
DescriptionSeverity
Data Sourced
via NVD·06:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Feb 28, 2024
News Published
via BleepingComputer·05:24 PM
News Published
via BleepingComputer·05:26 PM
Mar 2, 2024
News Published
via BleepingComputer·03:09 PM
Mar 4, 2024
Known Ransomware
via CISA·12:00 AM
Apr 2, 2024
Exploit Published
via ExploitDB·12:00 AM
Apr 22, 2025
Exploit Published
12:00 AM
Feb 8, 2026
News Published
via The Register·10:25 PM
News Published
via The Register·10:28 PM
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Frequently Asked Questions

1

What is the severity of CVE-2024-21338?

CVE-2024-21338 is classified as a critical vulnerability that allows for privilege escalation in Microsoft Windows Kernel.

2

How do I fix CVE-2024-21338?

To fix CVE-2024-21338, apply the latest security updates provided by Microsoft for the affected Windows versions.

3

What versions of Windows are affected by CVE-2024-21338?

CVE-2024-21338 affects Windows 10, Windows 11, and Windows Server 2019 and 2022 across specific versions and builds.

4

Who can exploit CVE-2024-21338?

CVE-2024-21338 can be exploited by local attackers with access to the system, allowing them to escalate their privileges.

5

What is the impact of CVE-2024-21338?

The impact of CVE-2024-21338 includes potential unauthorized access to sensitive system operations due to privilege escalation.

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