7.5

CVE-2021-4186: fedoraproject fedora NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-4186DEBIAN-CVE-2021-4186
Published 30-12-2021Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2021-4186 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in fedoraproject fedora. EPSS estimates a 2.15% chance of exploitation in the next 30 days, higher than 81.7% 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
2.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
DLA-3906-1MGASA-2022-0004OPENSUSE-SU-2024:12329-1SUSE-SU-2022:3309-1USN-7552-1

Timeline

  1. 30-12-2021
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

2.15%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

0.00 pp

From 2.15% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.15%

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
  • wireshark< 3.6.0-1
Fedoraproject1 product
Ubuntu1 product
  • wireshark< 3.2.3-1ubuntu0.1~esm2
Wireshark1 product
Wireshark foundation1 product

5 vendors · 5 products

References

14 links
Show all 14 references