Hello,
Thank you for reporting the issue.
We need crash dump files from this folder for solve your problem.
C:\Users\<Name>\AppData\Local\Arma 3\
Can you upload somewhere in winrar package please?
When package will be smaller than 5000k, you can attach it here. When package is bigger, please use some free sharing service and post link here.

How to find correct crashdump file:
Try to make the crash happen
Look into crashdump folder
Upload crashdump with latest date in name (crashdump is rpt + bidmp + mdmp file with same name). Please try to provide as many crashdumps as possible, it helps us investigating the problem in a big way.

Thank you.

http://feedback.arma3.com/how-to-user.html

I'm experiencing random crashes since the last arma update as well. Currently I'm playing only the koth mod, so I can't really tell if it happens in other situations as well. Usually it happens after half hour or hour of playing - have never seen those issues before. A file check via steam didn't helped.

Here are my dump files:
https://www.dropbox.com/s/vwir2yi3es2316g/armacrash.zip?dl=0

Usually I'm playing on the UK or FR servers hosted by inch, but I've had the same issue on other servers

I have the same problem. Crashing in KOTH scenario. I have attached the latest crash info. Have much more crashes and can send if you need. After 1.28 has been released I start receive crashes every hour. Had no crashes for 6 month or more of playing before.

same thing

Leafback and I have been experiencing this crash many times when we play a KOTH scenario. In addition, we can confirm that both he and I crash at exactly the same time every single time. When I crash, if I am lucky my game will stutter a couple of times, then freeze completely. I have to tab out of the game in order to close it because ARMA 3 stops responding.
We live on opposite sides of the US so it is not an ISP or shared IP address issue. I began experiencing these crashes on 8/27 and am still getting them.
Server host is always Hostile Takover

Specs:
OS : Windows 7 Ultimate, 64x
Processor : Intel Core i5-4570 CPU @ 3.20 GHz (4CPUs), ~ 3.2GHz
8gb RAM
Graphics: NVIDIA GeForce GTX770

I've been also experiencing similar crashes while playing King of the Hill over the past week. I usually play on the Hostile Takeover hosted servers and first experienced it on US # 2 HC. I play often with Felise (also posting here) and we usually crash at the same moment. Symptoms when I crash is the game stuttering briefly (1-3 seconds long) like a drop in frames per second. Immediately following this stutter, a total crash happens at the same second when Felise reports her game has crashed. I must then alt-tab to close the game.

We have played together on another Hostile Takeover server and we didn't crash at all. I'll run tests to try to remember with server it was and will update here. I THINK it's CA # 2 HC, but I can't join that server because it's giving me a BattleEye Script Restriction # 38. No one else is currently playing on it either.

Crash files: https://www.dropbox.com/s/tfzh9dch2eivqu0/Arma%203.rar?dl=0

Specs:
Windows 7 64bit
i7-2600
8 gigs
NVidia GTX 560 Ti

I'm STILL getting this same issue. Has it been addressed yet?