VERSION
Chrome Version: 57.0.2987.21 beta (64-bit), pepflashplayer 24.0.0.221
Operating System: Windows 7 en 64-bit

REPRODUCTION CASE

Open the poc in the attachment with chrome and observe the crash.
There is also a detailed write-up about the vulnerability in the attachment.


FOR CRASHES, PLEASE INCLUDE THE FOLLOWING ADDITIONAL INFORMATION
Type of crash: tab
Crash State: 

(18a4.1a94): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
pepflashplayer!PPP_ShutdownBroker+0x2291d7:
000007fe`d9acd9d7 488b4750        mov     rax,qword ptr [rdi+50h] ds:00000000`80000040=????????????????
7:107> k
Child-SP          RetAddr           Call Site
00000000`0019dc40 000007fe`d9c91659 pepflashplayer!PPP_ShutdownBroker+0x2291d7
00000000`0019dcb0 000007fe`d9a8da8a pepflashplayer!PPP_ShutdownBroker+0x3ece59
00000000`0019e460 000007fe`d9a8eade pepflashplayer!PPP_ShutdownBroker+0x1e928a
00000000`0019e4c0 000007fe`d9ad7339 pepflashplayer!PPP_ShutdownBroker+0x1ea2de
00000000`0019e780 000007fe`d9ad72e6 pepflashplayer!PPP_ShutdownBroker+0x232b39
00000000`0019e7b0 000007fe`d9a9d111 pepflashplayer!PPP_ShutdownBroker+0x232ae6
00000000`0019e800 000007fe`d98bb75d pepflashplayer!PPP_ShutdownBroker+0x1f8911
00000000`0019e890 000007fe`d98e127b pepflashplayer!PPP_ShutdownBroker+0x16f5d
00000000`0019eaa0 000007fe`d98e118e pepflashplayer!PPP_ShutdownBroker+0x3ca7b
00000000`0019eaf0 000007fe`d98e163c pepflashplayer!PPP_ShutdownBroker+0x3c98e
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files (x86)\Google\Chrome\Application\57.0.2987.21\chrome_child.dll - 
00000000`0019eb20 000007fe`d57d2574 pepflashplayer!PPP_ShutdownBroker+0x3ce3c
00000000`0019eb50 000007fe`d58180d5 chrome_child!IsSandboxedProcess+0x216f4
00000000`0019eb80 000007fe`d57ecf8a chrome_child!IsSandboxedProcess+0x67255
00000000`0019ebf0 000007fe`d57ecabc chrome_child!IsSandboxedProcess+0x3c10a
00000000`0019ec20 000007fe`d57ecc06 chrome_child!IsSandboxedProcess+0x3bc3c
00000000`0019ec90 000007fe`d57bdf96 chrome_child!IsSandboxedProcess+0x3bd86
00000000`0019ee00 000007fe`d41723fe chrome_child!IsSandboxedProcess+0xd116
00000000`0019ee30 000007fe`d412718c chrome_child!ovly_debug_event+0xc9fce
00000000`0019ef90 000007fe`d41729b6 chrome_child!ovly_debug_event+0x7ed5c
00000000`0019f0b0 000007fe`d4171b8c chrome_child!ovly_debug_event+0xca586


Credit:

Yuki Chen Of Qihoo 360 Vulcan Team