Description
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, parse_raw_packet_to_simple_packet_full() in src/simple_packet_parser_ng.cpp dereferences ipv6_extension_header_fragment_t when IpProtocolNumberIPV6_FRAG is present without first verifying that the eight-byte Fragment header remains. A crafted sFlow v5 RAW_PACKET_HEADER record can remotely reach this shared parser with the Fragment bytes omitted, causing an unauthenticated remote out-of-bounds read. The supplied harness detects the read under AddressSanitizer, but the advisory does not establish a production process crash. No fixed release is available as of this review.
Published: 2026-11-05
Score: 8.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Advisories

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History

Fri, 06 Nov 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Pavel-odintsov
Pavel-odintsov fastnetmon
Vendors & Products Pavel-odintsov
Pavel-odintsov fastnetmon

Thu, 05 Nov 2026 22:45:00 +0000

Type Values Removed Values Added
Description FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, parse_raw_packet_to_simple_packet_full() in src/simple_packet_parser_ng.cpp dereferences ipv6_extension_header_fragment_t when IpProtocolNumberIPV6_FRAG is present without first verifying that the eight-byte Fragment header remains. A crafted sFlow v5 RAW_PACKET_HEADER record can remotely reach this shared parser with the Fragment bytes omitted, causing an unauthenticated remote out-of-bounds read. The supplied harness detects the read under AddressSanitizer, but the advisory does not establish a production process crash. No fixed release is available as of this review.
Title FastNetMon: IPv6 Fragment header dereferenced without bounds check in shared packet parser
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'}


Subscriptions

Pavel-odintsov Fastnetmon
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-05T22:32:35.388Z

Reserved: 2026-09-16T16:22:31.540Z

Link: CVE-2026-92693

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-05T23:17:01.923

Modified: 2026-11-05T23:17:02.073

Link: CVE-2026-92693

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T23:45:07Z

Weaknesses