The version 5.2.1(Release 5.2.1(b5-6)) was released but it does not have any release note yet.
But I got the bug list from peerapp.
This will be helpful before the release in CCO.
You can follow the below upgrade guide for the kernel and ISO image upgrade.
http://www.cisco.com/c/dam/en/us/td/docs/video/videoscape/distribution_suite/vds/v5_2_1/VDS-TC_5_2_1_app_upgrade_guide.pdf
The official release note comes out and you can check it at the following url.
http://www.cisco.com/c/dam/en/us/td/docs/video/videoscape/distribution_suite/vds/v5_2_1/VDS_TC_5_2_1_ReleaseNotes.pdf
Bug# | Issue |
ULTR-8841 | Spread corruption (memory overrun) |
ULTR-8508 / 8506 | IO latency - cache-out drop |
ULTR-8784 | cache engine Infinite loop (TCP option header size variable defined as unsigned8 instead of unsigned16) |
ULTR-8668 | cache engine Overload Core (buffer size) |
ULTR-9055 | IBM storage iSCSI connection reduction (script) |
ULTR-8331 | CMDB Storage Sync (/lost+found script) |
ULTR-8480 | Sync Core while activating cache-sync CLI command |
ULTR-8493 | cache-out port disconnect |
ULTR-8818 | Long file is not cached |
ULTR-8815 | 4GB files are not cached (google play) |
ULTR-9056 | Asymmetric connections should be ignored (no filter, no pushup) |
ULTR-8637 | Cisco|CNM|Server was reboot by leader after soft lockup |
ULTR-8609 | Cisco|SKB|CDR Cleaner fails on long files list |
ULTR-8474 | Clone of ULTR-7875 - Cisco | running 'cache sync' on stopped CE return wrong error message |
ULTR-8299 | Remove the need to input # of CEs to the lost_and_found script |
ULTR-8298 | Add to lost_and_found script the ability to work on standalone appliances |
ULTR-9066 | Core: Connector| Bittorent Core |
ULTR-9224 | Core in memcpy() |
ULTR-9132 | Cache-out connections leak |
ULTR-9016 | 100% CPU utilization (ping to storage) |
ULTR-8592 | Netflix || There are cases that UltraBand does not recognize Netflix string "v=" in the URI |
ULTR-8561 | SKB | Cisco | CDR quota not enforced |
ULTR-9459 | CLONE 5.2.1 CVS - Large amount of "connection ... Asymmetric traffic recognized" in /var/logs |
ULTR-9464 | CLONE 5.2.1 CVS - tcp_fin_wait_to=200 parameter caused cache-out problem |
ULTR-9426 | 0.66| Core in in application_session_c::get_conn_id |
ULTR-9400 | Pornhub |pang delete the file after cache-out with check sum failed reason |