pavel-odintsov FastNetMon up to 1.2.9 Packet Parser simple_packet_parser_ng.cpp parse_raw_packet_to_simple_packet_full out-of-bounds

Summaryinfo

A vulnerability identified as problematic has been detected in pavel-odintsov FastNetMon up to 1.2.9. This issue affects the function parse_raw_packet_to_simple_packet_full of the file src/simple_packet_parser_ng.cpp of the component Packet Parser. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2026-92693. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in pavel-odintsov FastNetMon up to 1.2.9 and classified as problematic. This issue affects the function parse_raw_packet_to_simple_packet_full of the file src/simple_packet_parser_ng.cpp of the component Packet Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-92693 since 09/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• pavel-odintsov

Name

• FastNetMon

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9

Website

• Product: https://github.com/pavel-odintsov/fastnetmon/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion