CVE-2026-39892

ADVISORY - github

Summary

If a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. For example:

h = Hash(SHA256())
b.update(buf[::-1])

would read past the end of the buffer on Python >3.11

ADVISORY - nist

Improper Restriction of Operations within the Bounds of a Memory Buffer

ADVISORY - github

Improper Restriction of Operations within the Bounds of a Memory Buffer

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