CVE-2025-48990 – NeKernal Heap Overflow

CVE ID : CVE-2025-48990

Published : June 2, 2025, 12:15 p.m. | 2 hours, 10 minutes ago

Description : NeKernal is a free and open-source operating system stack. Version 0.0.2 has a 1-byte heap overflow in `rt_copy_memory`, which unconditionally wrote a null terminator at `dst[len]`. When `len` equals the size of the destination buffer (256 bytes), that extra `”` write overruns the buffer by one byte. To avoid breaking existing callers or changing the public API, the patch in commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee takes a minimal approach: it simply removes the overflow-causing line without adding bounds checks or altering the function signature.

Severity: 0.0 | NA

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