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TI-2026-83085 Aliases CVE-2026-119600GHSA-rjcg-fcj6-3hq4

Out-of-bounds read in tcpflow lets attackers leak process memory

Priority LOW 28CWE-130Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

tcpflow through 1.6.1 from simsong contains an out-of-bounds read in its TCP demultiplexer. The flaw comes from mishandling inconsistent IP payload lengths (CWE-130). An unauthenticated attacker can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent process memory into reconstructed flow files or crash tcpflow.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00373 31st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
simsongtcpflowup to 1.6.1—No fix listedCNA
  • tcpflow Vendorsimsong Affected up to 1.6.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for tcpflow.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-119600
  2. 2026-10-30 Alias added: GHSA-rjcg-fcj6-3hq4
  3. 2026-11-01 Priority changed: MEDIUM → LOW
  4. 2026-11-03 Affected versions changed · Red Hat
  5. 2026-11-03 CVSS score added · Red Hat
  6. 2026-11-04 CISA SSVC decision points changed

References

Advisory 1

Other 4

  • TI-2026-20056 bulk_extractor has Heap-based Buffer Overflow vulnerability CVSS 4.0MEDIUM 5.5
  • TI-2026-20245 tcpflow has TIM Element OOB Write in wifipcap CVSS 4.0MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences