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Topic review

martin

Re: Memory Leak using S3

Thanks for your report. Is this problem in some recent version of WinSCP?
If it is, can you please try to identify what exact version did introduce the problem?
You can download all versions of WinSCP from:
https://sourceforge.net/projects/winscp/files/WinSCP/
Toni76

Memory Leak using S3

When deleting a large number of foldes/subfolders/files in an S3 storage, the application runs out of memory:

  • WinSCP shows an error message box (Cancel/Try again/Skip/...): "SSL handshake failed: SSL error: malloc failure"
  • Windows Task Manager shows ~3.9 GB allocated for WinSCP.exe, slightly below the 4 GB limit.
    Cancelling the task results in expectable subsequent errors ("Invalid access to memory location.") but not in memory being released, according to Task Manager.

Using WinSCP 6.7 (Build 17845 2026-10-14) on Windows 10 22H2 64-bit.

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