7.5

CVE-2021-39923: debian debian_linux Excessive Iteration

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-39923DEBIAN-CVE-2021-39923
Published 19-11-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-39923 is a high (CVSS 7.5) Excessive Iteration vulnerability in debian debian_linux. EPSS estimates a 1.58% chance of exploitation in the next 30 days, higher than 75.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.58%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-2849-1DSA-5019-1

Timeline

  1. 19-11-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Large loop in the PNRP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.58%

Chance of exploitation in the next 30 days

Percentile

75%

Versus all other CVEs

30-day change

0.00 pp

From 1.58% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.58%

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

Debian2 products
Ubuntu1 product
  • wiresharkAll versions (No fix recorded)
Wireshark1 product
  • wireshark≥ 3.2.0, ≤ 3.2.17 | ≥ 3.4.0, ≤ 3.4.9
Wireshark foundation1 product
  • wireshark≥ 3.2.0, < 3.2.18 | ≥ 3.4.0, < 3.4.10

4 vendors · 5 products

References

11 links
Show all 11 references