Microsoft warns of flaw in 32-bit Windows kernel

Microsoft is warning customers of a hole in the kernel of 32-bit versions of Windows that could allow someone to install programs, change data, or create new accounts with full user rights.

The vulnerability, caused by the Windows kernel not properly handling certain exceptions, affects 32-bit versions of Windows 7, Vista, XP, 2000, and Server 2003 and 2008, according to the security advisory released on Wednesday night. It does not affect 64-bit versions of Windows.

"We are not currently aware of any active attacks against this vulnerability, and Microsoft believes the risk to customers, at this time, is limited," Jerry Bryant, senior security program manager at Microsoft, said in a statement.