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CVE-2026-92695

FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames

8.2 High

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
High

Exploit likelihood

0.26%Unchanged since Nov 6, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.2

FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
CVE-2026-92695
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-125
Updated
2026-11-05
EUVDEUVD-2026-117833 8.2

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
EUVD-2026-117833
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-05
NVD 8.2

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
CVE-2026-92695
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-125
Updated
2026-11-06
OSV 8.2

FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
CVE-2026-92695
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness
CWE-125
Updated
2026-11-07
OSVDEBIAN-CVE-2026-92695 8.2

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
DEBIAN-CVE-2026-92695
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-06
OSVUBUNTU-CVE-2026-92695 8.2

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.

Record
UBUNTU-CVE-2026-92695
CVSS 3.1
8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Updated
2026-11-07

Affected products

Affected packages

Affected packages
PackageAffectedFixed
fastnetmon
Debian:12
All versions, plus listed versions
1.2.4-21.2.4-2+deb12u11.2.5-11.2.5-21.2.5-2~bpo12+1
Show 9 moreShow less
1.2.6-11.2.6-1~bpo12+11.2.7-11.2.7-1~bpo12+11.2.8+git20250911-11.2.8+git20250911-21.2.8-11.2.8-1~bpo12+11.2.9-1
None known
fastnetmon
Debian:13
All versions, plus listed versions
1.2.8+git20250911-11.2.8+git20250911-21.2.8-11.2.9-0+deb13u11.2.9-1
None known
fastnetmon
Debian:14
All versions, plus listed versions
1.2.8+git20250911-11.2.8+git20250911-21.2.8-11.2.9-1
None known
fastnetmon
Ubuntu:18.04:LTS
All versions, plus listed versions
1.1.3+dfsg-31.1.3+dfsg-41.1.3+dfsg-6build1
None known
fastnetmon
Ubuntu:Pro:20.04:LTS
All versions, plus listed versions
1.1.4-11.1.4-1build31.1.4-1build41.1.4-1build51.1.4-1ubuntu0.1~esm1
None known
fastnetmon
Ubuntu:Pro:24.04:LTS
All versions, plus listed versions
1.2.5-11.2.6-11.2.6-1build11.2.6-1build21.2.6-1build31.2.6-1build41.2.6-1ubuntu0.1~esm1
None known
fastnetmon
Ubuntu:26.10
All versions, plus listed versions
1.2.8+git20250911-21.2.9-11.2.9-1build11.2.9-1build2
None known
fastnetmon
Ubuntu:Pro:26.04:LTS
All versions, plus listed versions
1.2.8+git20250911-11.2.8+git20250911-1build11.2.8+git20250911-1build21.2.8+git20250911-21.2.8+git20250911-2ubuntu0.1~esm1
None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliases, referencesOSV
affected, aliases, referencesNVD, OSV
cwes, references, severity, titleCVE List
first indexedEUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-92695 is a high vulnerability (CVSS 8.2) in Pavel-odintsov Fastnetmon, published November 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. No source names a fixed version.

References

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