Microsoft Win32k Privilege Escalation Vulnerability (CVE-2019-0803)
Severity: high · Patch status: patched · Since 2021-11-03 · CVE-2019-0803
Microsoft Win32k contains an unspecified vulnerability due to it failing to properly handle objects in memory causing privilege escalation. Successful exploitation allows an attacker to run code in kernel mode. CISA added CVE-2019-0803 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by May 3, 2022 (BOD 22-01); treat that as the outer limit.
Sources
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