nekernel 0.0.2 Utils.cc heap-based overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in nekernel 0.0.2. This vulnerability affects unknown code of the file Utils.cc. Such manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2025-48990. The attack must be carried out locally. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in nekernel 0.0.2. Affected by this issue is an unknown functionality of the file Utils.cc. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-48990 since 05/29/2025. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Applying a patch is able to eliminate this problem.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• nekernel

Version

• 0.0.2

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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