7.5

CVE-2026-76879: wireshark foundation wireshark Stack-based Buffer Overflow

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-76879DEBIAN-CVE-2026-76879
Published 19-08-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-76879 is a high (CVSS 7.5) Stack-based Buffer Overflow vulnerability in wireshark foundation wireshark. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.5% 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 (CVE.org)
EPSS score
0.31%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
OPENSUSE-SU-2026:11579-1OPENSUSE-SU-2026:22014-1RHSA-2026:84721SUSE-SU-2026:24013-1SUSE-SU-2026:4379-1

Timeline

  1. 19-08-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

Description

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

+0.04 pp

From 0.27% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.31%

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) | < 4.4.18-0+deb13u1 | < 4.6.9-1
Ubuntu1 product
  • wiresharkAll versions (No fix recorded)
Wireshark1 product
  • wireshark≥ 4.4.0, < 4.4.18 | ≥ 4.6.0, < 4.6.8
Wireshark foundation1 product
  • wireshark≥ 4.6.0, < 4.6.8 | ≥ 4.4.0, < 4.4.18

4 vendors · 4 products

References

6 links