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bugfix(system): Prevent buffer overflows and uninitialized memory in stack dump and exception handling#494

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x64-dev merged 1 commit intomainfrom
seer/bugfix/safe-string-ops-stackdump
May 7, 2026
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bugfix(system): Prevent buffer overflows and uninitialized memory in stack dump and exception handling#494
x64-dev merged 1 commit intomainfrom
seer/bugfix/safe-string-ops-stackdump

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@seer-by-sentry seer-by-sentry Bot commented May 7, 2026

Fixes CLIENT-4F4. The issue was that: Exception handler's strlcat on non-null-terminated buffer causes strnlen_t to read out-of-bounds, leading to access violation.

  • Initialize scrap buffers to zero to prevent uninitialized memory issues.
  • Replace lstrcat with strlcat for safer string concatenation, preventing buffer overflows.
  • Replace sprintf with snprintf for safer string formatting, preventing buffer overflows.

This fix was generated by Seer in Sentry, triggered automatically. 👁️ Run ID: 13855438

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@x64-dev x64-dev marked this pull request as ready for review May 7, 2026 21:26
@x64-dev x64-dev merged commit 94422d3 into main May 7, 2026
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