CVE-2025-48990

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/nekernel-org/nekernel/commit/fb7b7f658327f659c6a6da1af151cb389c2ca4ee
https://github.com/nekernel-org/nekernel/security/advisories/GHSA-jvvh-fp57-2p32

Configurations

No configuration.

History

15 Apr 2026, 00:35

Type	Values Removed	Values Added
Summary		(es) NeKernal es una pila de sistema operativo libre y de código abierto. La versión 0.0.2 presenta un desbordamiento de pila de 1 byte en `rt_copy_memory`, que escribió incondicionalmente un terminador nulo en `dst[len]`. Cuando `len` es igual al tamaño del búfer de destino (256 bytes), esa escritura adicional `'\0'` desborda el búfer en un byte. Para evitar interrumpir las llamadas existentes o modificar la API pública, el parche en el commit fb7b7f658327f659c6a6da1af151cb389c2ca4ee adopta un enfoque minimalista: simplemente elimina la línea que causa el desbordamiento sin añadir comprobaciones de los límites ni modificar la firma de la función.

02 Jun 2025, 12:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-06-02 12:15

Updated : 2026-06-17 09:30

NVD link : CVE-2025-48990

Mitre link : CVE-2025-48990

CVE.ORG link : CVE-2025-48990

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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