7.5

CVE-2026-71855: oisf suricata Incorrect Comparison

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-71855DEBIAN-CVE-2026-71855
Published 18-09-2026Last modified 25-09-2026
Open JSON

Vulnerability summary

CVE-2026-71855 is a high (CVSS 7.5) Incorrect Comparison vulnerability in oisf suricata. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.31%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 25-09-2026
    Last modifiedVulnerability information updated.

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, src/flow-hash.c can treat an IPv4 and IPv6 flow as equal without comparing the IP family when their raw address words, ports, protocol, VLAN, recursion level, live device, and hash bucket align. An IPv6 packet can therefore reuse IPv4 flow state or the reverse, causing incorrect flowbit state, detection bypass, or IP-only bypass. This issue is fixed in versions 8.0.6 and 7.0.17.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

0.00 pp

From 0.31% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • suricataAll versions (No fix recorded) | < 1:8.0.6-1
Oisf1 product
Ubuntu1 product
  • suricataAll versions (No fix recorded)

3 vendors · 3 products

References

10 links