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Title: zlib: fix use-after-free when reset() is called during write by mcollina · Pull Request #62325 · nodejs/node · GitHub

Open Graph Title: zlib: fix use-after-free when reset() is called during write by mcollina · Pull Request #62325 · nodejs/node

X Title: zlib: fix use-after-free when reset() is called during write by mcollina · Pull Request #62325 · nodejs/node

Description: The Reset() method did not check the write_in_progress_ flag before resetting the compression stream. This allowed reset() to free the compression library's internal state while a worker thread was still using it during an async write, causing a use-after-free. Add a write_in_progress_ guard to Reset() that throws an error if a write is in progress, matching the existing pattern used by Close() and Write(). This does not fall within a threat model because it cannot be exploited from the outside. Refs: https://hackerone.com/reports/3609132

Open Graph Description: The Reset() method did not check the write_in_progress_ flag before resetting the compression stream. This allowed reset() to free the compression library's internal state while a worker thread...

X Description: The Reset() method did not check the write_in_progress_ flag before resetting the compression stream. This allowed reset() to free the compression library's internal state while a worker th...

Opengraph URL: https://github.com/nodejs/node/pull/62325

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