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CVE-2025-24983 Microsoft CVE debrief

CVE-2025-24983 is a Microsoft Windows Win32k use-after-free vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2025-03-11. The supplied corpus does not include exploit details, affected versions, or a CVSS score, but the KEV listing means it should be treated as an urgent patching priority for Windows environments.

Vendor
Microsoft
Product
Windows
CVSS
HIGH 7
CISA KEV
Listed
Original CVE published
2025-03-11
Original CVE updated
2025-03-11
Advisory published
2025-03-11
Advisory updated
2025-03-11

Who should care

Windows administrators, endpoint and security operations teams, vulnerability management teams, and any organization responsible for Microsoft Windows systems should care, especially where patch deployment is centralized or delayed.

Technical summary

The available source material identifies CVE-2025-24983 as a Microsoft Windows Win32k use-after-free issue. No further technical mechanics, affected build information, or severity score are included in the provided corpus. What is confirmed is that CISA lists the issue as known exploited, with a required remediation date of 2025-04-01, making vendor guidance and patch deployment the immediate defensive focus.

Defensive priority

Urgent

Recommended defensive actions

  • Review Microsoft's official guidance for CVE-2025-24983 and deploy the vendor fix on Windows systems as soon as possible.
  • Prioritize remediation to meet the CISA KEV due date of 2025-04-01 for all in-scope assets.
  • Inventory Windows endpoints and servers, then verify patch status and exposure across the fleet.
  • If immediate patching is not possible, apply any vendor mitigations and follow applicable CISA guidance for cloud services; discontinue use if mitigations are unavailable.
  • Monitor Windows systems for signs of abnormal behavior while remediation is in progress.

Evidence notes

The provided corpus names the vulnerability as "Microsoft Windows Win32k Use-After-Free Vulnerability" and marks it as a CISA KEV entry. Metadata confirms vendorProject=Microsoft, product=Windows, dateAdded=2025-03-11, dueDate=2025-04-01, and requiredAction to apply vendor mitigations per instructions. The source notes also point to Microsoft's security update guide for CVE-2025-24983 and the NVD record, but no additional exploit or version details are included here.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-24983 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-24983

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-24983 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-24983

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.