CVE-2018-8639 · netVigilance record NV25-0042
Microsoft Windows Win32k Improper Resource Shutdown or Release
past due ransomware
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2025-03-24 · passed 1 year 5 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.
Who is affected
Microsoft Windows. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-404.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 1 year 5 months ago
Sources
- NVD entry for CVE-2018-8639 nvd.nist.gov/vuln/detail/CVE-2018-8639
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- msrc.microsoft.com msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2018-8639