7.5

CVE-2026-6520: wireshark foundation wireshark Infinite Loop

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-6520DEBIAN-CVE-2026-6520
Published 30-04-2026Last modified 30-04-2026
Open JSON

Vulnerability summary

CVE-2026-6520 is a high (CVSS 7.5) Infinite Loop vulnerability in wireshark foundation wireshark. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.27%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:10686-1SUSE-SU-2026:3501-1

Timeline

  1. 30-04-2026
    PublishedVulnerability first disclosed.
  2. 30-04-2026
    Last modifiedVulnerability information updated.

Description

OpenFlow v6 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

+0.10 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (gitlab.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • wiresharkAll versions (No fix recorded) | < 4.4.15-0+deb13u1 | < 4.6.5-1
Ubuntu1 product
  • wiresharkAll versions (No fix recorded)
Wireshark1 product
  • wireshark≥ 4.4.0, ≤ 4.4.14 | ≥ 4.6.0, ≤ 4.6.4
Wireshark foundation1 product
  • wireshark≥ 4.6.0, < 4.6.5 | ≥ 4.4.0, < 4.4.15

4 vendors · 4 products

References

5 links