CVE-2025-48990

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 `'\0'` 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.

Reserved 2025-05-29 | Published 2025-06-02 | Updated 2025-06-02 | Assigner GitHub_M

Problem types

CWE-122: Heap-based Buffer Overflow

Product status

= 0.0.2
affected

References

github.com/...kernel/security/advisories/GHSA-jvvh-fp57-2p32

github.com/...ommit/fb7b7f658327f659c6a6da1af151cb389c2ca4ee

cve.org (CVE-2025-48990)

nvd.nist.gov (CVE-2025-48990)

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