We are seeing a large number (100+) of crashes in a customer environment that took the July 10th Acrobat Reader DC update (today). The crash is always an Access Violation thrown from your WM_GETMINMAX message handler on one of the background threads and the main UI thread is idle. We monitor the crashes in these environments very closely and did not see a single instance with this pattern until today's update.
Image path: C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.dll
Timestamp: Fri Jun 29 09:05:21 2018 (5B363CA1)
File version: 18.11.20055.27899
Stack:
06 2b63dbe4 77092df3 2b63dc08 00000000 00000000 KERNELBASE!UnhandledExceptionFilter+0x165
07 2b63dc88 770205d6 2b63dd98 2b63dde8 7701ff41 ntdll!LdrpLogFatalUserCallbackException+0x4d
08 2b63dc94 7701ff41 2b63dd98 2b63e51c 2b63dde8 ntdll!KiUserCallbackExceptionHandler+0x26
09 2b63dcb8 7701ff13 2b63dd98 2b63e51c 2b63dde8 ntdll!ExecuteHandler2+0x26
0a 2b63dd80 7702068f 2b63dd98 2b63dde8 2b63dd98 ntdll!ExecuteHandler+0x24
0b 2b63dd80 2e180ecf 2b63dd98 2b63dde8 2b63dd98 ntdll!KiUserExceptionDispatcher+0xf
0c 2b63e274 74b690d1 2e180ecf 000709f2 00000024 AcroRd32+0x30ecf
0d 2b63e308 74b74d95 2e180ecf 00000000 00000024 user32!UserCallWinProcCheckWow+0x18e
0e 2b63e344 2e1817a8 2e180ecf 000709f2 00000024 user32!CallWindowProcW+0x8d
0f 2b63e360 2e181740 000709f2 00000024 00000000 AcroRd32+0x317a8
10 2b63e37c 2e181707 000709f2 00000024 00000000 AcroRd32+0x31740
11 2b63e394 2e1811e2 2b63e534 2e180f3f 00000024 AcroRd32+0x31707
12 2b63e3ac 74b68e71 000709f2 00000024 00000000 AcroRd32+0x311e2
13 2b63e3d8 74b690d1 2e180f3f 000709f2 00000024 user32!_InternalCallWinProc+0x2b 0x24 = WM_GETMINMAX
14 2b63e46c 74b6932c 2e180f3f 00000000 00000024 user32!UserCallWinProcCheckWow+0x18e
15 2b63e4cc 74b71723 00b4d260 00000000 00000024 user32!DispatchClientMessage+0xdc
16 2b63e50c 77020666 2b63e524 00000000 2b63e9b4 user32!__fnINOUTLPPOINT5+0x43
17 2b63e560 74b77da5 00000000 2b63e8e0 2b63e5b8 ntdll!KiUserCallbackDispatcher+0x36
18 2b63e840 74b77f61 2b63e890 00000000 00000000 user32!VerNtUserCreateWindowEx+0x203
19 2b63e920 74b77fe7 2efde728 00000000 00000000 user32!CreateWindowInternal+0x17c
1a 2b63e95c 2e17d22d 00000000 2efe0f14 2efde728 user32!CreateWindowExW+0x37
1b 2b63e9c4 2e17fa34 00000000 2efe0f14 2efde728 AcroRd32+0x2d22d
1c 2b63eab0 2e17f77c 00000000 2efe0f14 2efde728 AcroRd32+0x2fa34
1d 2b63eb08 2e17f722 aa14302e 00000001 1cb016d8 AcroRd32+0x2f77c
1e 2b63eb30 2e17df4b aa142c7e 00000000 1cb016d8 AcroRd32+0x2f722
1f 2b63f760 2e17a826 aa142cd2 70716ede 749b69e0 AcroRd32+0x2df4b
20 2b63f7cc 2e179fed 2e150000 00000000 1c78e350 AcroRd32+0x2a826
21 2b63f7ec 61e67c7c 2e150000 00000000 1c78e350 AcroRd32+0x29fed
22 2b63ff80 749a7c04 328beb62 749a7be0 0829812c AcroPDFImpl+0x1c6d9
23 2b63ff94 7703ad8f 328beb62 01442815 00000000 kernel32!BaseThreadInitThunk+0x24
24 2b63ffdc 7703ad5a ffffffff 770200a3 00000000 ntdll!__RtlUserThreadStart+0x2f
25 2b63ffec 00000000 61e67961 328beb62 00000000 ntdll!_RtlUserThreadStart+0x1b