latest build   
MP4Box - GPAC version 2.3-DEV-rev531-g61f1cf39e-master
and   
MP4Box - GPAC version 2.3-DEV-rev314-gedc6d8aa9-master
all have this issue 

my command is 
mp4box -dash 30000 -profile onDemand big.mp4 -out dash.mpd --dual

big.mp4   is  18GB
my system memory is :
free -h
                    total        used        free      shared  buff/cache   available
Mem:            15G        2.1G         12G        5.3M        506M         13G
Swap:          3.0G        2.6G        400M

[11768127.914421] Out of memory: Kill process 16249 (mp4box) score 694 or sacrifice child 
[11768127.914794] Killed process 16249 (mp4box), UID 0, total-vm:13886608kB, anon-rss:13692940kB, file-rss:4kB, shmem-rss:0kB

only 5.5GB data has been converted
-rw-------. 1 root    root     18G Sep 11 06:17 big.mp4
-rw-------. 1 root    root    5.5G Sep 11 08:17 big_dashinit.mp4


is there a memory leak in this case ?
we can not provide you the big.mp4 since it is customer data

mp4box out of memory when convert normal mp4 to fmp4  
This is a GitHub Issue
repo:gpac
owner:gpac
Title : mp4box out of memory when convert normal mp4 to fmp4  
Issue date:

--- start body ---
latest build   
MP4Box - GPAC version 2.3-DEV-rev531-g61f1cf39e-master
and   
MP4Box - GPAC version 2.3-DEV-rev314-gedc6d8aa9-master
all have this issue 

my command is 
mp4box -dash 30000 -profile onDemand big.mp4 -out dash.mpd --dual

big.mp4   is  18GB
my system memory is :
free -h
                    total        used        free      shared  buff/cache   available
Mem:            15G        2.1G         12G        5.3M        506M         13G
Swap:          3.0G        2.6G        400M

[11768127.914421] Out of memory: Kill process 16249 (mp4box) score 694 or sacrifice child 
[11768127.914794] Killed process 16249 (mp4box), UID 0, total-vm:13886608kB, anon-rss:13692940kB, file-rss:4kB, shmem-rss:0kB

only 5.5GB data has been converted
-rw-------. 1 root    root     18G Sep 11 06:17 big.mp4
-rw-------. 1 root    root    5.5G Sep 11 08:17 big_dashinit.mp4


is there a memory leak in this case ?
we can not provide you the big.mp4 since it is customer data

--- end body ---

The issue indicates that the MP4Box tool is running out of memory when attempting to convert a large MP4 file to fragmented MP4 (fMP4) format. This suggests a potential memory management issue, possibly a memory leak, in the MP4Box application when handling large files. However, without further investigation or a code review, it cannot be definitively classified as a security vulnerability.