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No exploitation reportedFix available

CVE-2021-39929

No exploitation reported by the sources we read.

  • Published2021-11-19
  • WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Uncontrolled Recursion in the Bluetooth DHT 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

Timeline

dates in UTC
  1. 2021-11-1917:15CVE publishedNVD

Versions per branch

NVD
Wireshark
BranchAffectedFixed in
3.2≥ 3.2.0, ≤ 3.2.17no fix published
3.4≥ 3.4.0, ≤ 3.4.9no fix published
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published
35.x= 35no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • wiresharkUbuntu:Pro:22.04:LTSall versions · fixed in 3.6.2-2ubuntu0.1~esm1
  • wiresharkUbuntu:Pro:20.04:LTSall versions · fixed in 3.2.3-1ubuntu0.1~esm2
  • wiresharkUbuntu:Pro:18.04:LTSall versions · fixed in 2.6.10-1~ubuntu18.04.0+esm2
  • wiresharkUbuntu:Pro:16.04:LTSall versions · fixed in 2.6.10-1~ubuntu16.04.0+esm2
  • wiresharkUbuntu:Pro:14.04:LTSall versions · fixed in 2.6.10-1~ubuntu14.04.0~esm3
  • wiresharkSUSE:Linux Enterprise Module for Desktop Applications 15 SP3all versions · fixed in 3.4.10-3.62.1
  • wiresharkSUSE:Linux Enterprise Module for Desktop Applications 15 SP2all versions · fixed in 3.4.10-3.62.1
  • wiresharkSUSE:Linux Enterprise Module for Basesystem 15 SP3all versions · fixed in 3.4.10-3.62.1

22 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-39929 Red Hat Product Security

    wireshark: bluetooth DHT dissector crash

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-674read 2026-10-23
  • FIRST EPSSEPSS score3.8 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-11-19
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jcx2-5qw3-59p6

Frequently asked questions

What is CVE-2021-39929?

Uncontrolled Recursion in the Bluetooth DHT 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

Is CVE-2021-39929 actively exploited?

Active exploitation of CVE-2021-39929 has not been confirmed. Its EPSS score was 3.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-39929?

CVE-2021-39929 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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