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: 

(d94.13e0): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.

(1718.480): 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`df54d9d7 488b4750        mov     rax,qword ptr [rdi+50h] ds:00000000`80000040=????????????????
8:123> k
Child-SP          RetAddr           Call Site
00000000`002cd870 000007fe`df70c401 pepflashplayer!PPP_ShutdownBroker+0x2291d7
00000000`002cd8e0 000007fe`df712aee pepflashplayer!PPP_ShutdownBroker+0x3e7c01
00000000`002cd940 000007fe`df50da8a pepflashplayer!PPP_ShutdownBroker+0x3ee2ee
00000000`002ce0f0 000007fe`df50eade pepflashplayer!PPP_ShutdownBroker+0x1e928a
00000000`002ce150 000007fe`df557339 pepflashplayer!PPP_ShutdownBroker+0x1ea2de
00000000`002ce410 000007fe`df5572e6 pepflashplayer!PPP_ShutdownBroker+0x232b39
00000000`002ce440 000007fe`df51d111 pepflashplayer!PPP_ShutdownBroker+0x232ae6
00000000`002ce490 000007fe`df33b75d pepflashplayer!PPP_ShutdownBroker+0x1f8911
00000000`002ce520 000007fe`df36127b pepflashplayer!PPP_ShutdownBroker+0x16f5d
00000000`002ce730 000007fe`df36118e pepflashplayer!PPP_ShutdownBroker+0x3ca7b
00000000`002ce780 000007fe`df36163c 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`002ce7b0 000007fe`d9372574 pepflashplayer!PPP_ShutdownBroker+0x3ce3c
00000000`002ce7e0 000007fe`d93b80d5 chrome_child!IsSandboxedProcess+0x216f4
00000000`002ce810 000007fe`d938cf8a chrome_child!IsSandboxedProcess+0x67255
00000000`002ce880 000007fe`d938cabc chrome_child!IsSandboxedProcess+0x3c10a
00000000`002ce8b0 000007fe`d938cc06 chrome_child!IsSandboxedProcess+0x3bc3c
00000000`002ce920 000007fe`d935df96 chrome_child!IsSandboxedProcess+0x3bd86
00000000`002cea90 000007fe`d7d123fe chrome_child!IsSandboxedProcess+0xd116
00000000`002ceac0 000007fe`d7cc718c chrome_child!ovly_debug_event+0xc9fce
00000000`002cec20 000007fe`d7d129b6 chrome_child!ovly_debug_event+0x7ed5c


Credit:

Yuki Chen Of Qihoo 360 Vulcan Team