Buffer leak when using crypto ike

Question

I'm using a 851 router as an ezVPN remote and have started getting loads of small buffers which eventually lead to a system crash as they seem to be staying resident in the memory. I have not been able to work out how to fix it. Attached is the output of the sho buffer leak command. Any ideas?
sho buffers
Buffer elements:
1117 in free list (1119 max allowed)
36850 hits, 0 misses, 619 created
Public buffer pools:
Small buffers, 104 bytes (total 4308, permanent 50, peak 4308 @ 00:00:14):
22 in free list (20 min, 150 max allowed)
40367 hits, 1374 misses, 11 trims, 4269 created
0 failures (0 no memory)
Middle buffers, 600 bytes (total 25, permanent 25, peak 63 @ 21:43:15):
24 in free list (10 min, 150 max allowed)
26816 hits, 23 misses, 71 trims, 71 created
0 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50):
50 in free list (5 min, 150 max allowed)
3051 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 10):
9 in free list (0 min, 100 max allowed)
10297 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
0 in free list (0 min, 10 max allowed)
--More-- 0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Huge buffers, 18024 bytes (total 0, permanent 0):
0 in free list (0 min, 4 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Interface buffer pools:
SEC Eng Packet buffers, 1700 bytes (total 256, permanent 256):
0 in free list (0 min, 256 max allowed)
256 hits, 10298 fallbacks
256 max cache size, 256 in cache
87505 hits in cache, 0 misses in cache
Header pools:
Header buffers, 0 bytes (total 384, permanent 384):
0 in free list (0 min, 512 max allowed)
384 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
384 max cache size, 384 in cache
134521 hits in cache, 0 misses in cache

Answer 1

It looks like bug to me, check the bug-id:CSCsd69842.