Heap-based Buffer Overflow Affecting pavel-odintsov/fastnetmon package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-PAVELODINTSOVFASTNETMON-16963150
- published28 May 2026
- disclosed26 May 2026
- creditUnknown
Introduced: 26 May 2026
New Malicious CVE-2026-48689 (opens in a new tab)How to fix?
Avoid using pavel-odintsov/fastnetmon altogether.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow through the incorrect bounds check in the dynamic_binary_buffer_t class methods, including append_dynamic_buffer, append_data_as_pointer, append_data_as_object_ptr, memcpy_from_ptr, and memcpy_from_object_ptr. An attacker can execute arbitrary code or cause a denial of service by sending specially crafted network traffic (such as NetFlow, sFlow, IPFIX, or BGP messages) that triggers a write operation one byte past the end of a heap-allocated buffer.