CVE-2024-43500

Local memory disclosure via ReFS buffer over-read

Published Oct 8, 2024 · Updated Aug 19, 2026

Buffer over-read in Microsoft Windows ReFS allows local users to disclose memory contents through a crafted file-system operation. Microsoft identifies the locus as ReFS and the flaw as an out-of-bounds read, but has not published the affected routine, data structure, or malformed input that triggers it. Exploitation requires local low-privileged access and exposes memory without reported integrity or availability impact.

CVSS severity5.5
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer over-read in Microsoft Windows ReFS allows local users to disclose memory contents through a crafted file-system operation. Microsoft identifies the locus as ReFS and the flaw as an out-of-bounds read, but has not published the affected routine, data structure, or malformed input that triggers it. Exploitation requires local low-privileged access and exposes memory without reported integrity or availability impact.

The record

CVE
CVE-2024-43500
Published
Oct 8, 2024
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Windows 11, version 24H2
Classifications
CWE-126, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.26100.0 <10.0.26100.2033

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.2033
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1189
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4317
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4317
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4317

Published CVSS scores

5.5Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo