CVE-2021-38439
No exploitation reported by the sources we read.
- Published2022-05-05
- WeaknessCWE-122
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « 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
All versions of GurumDDS are vulnerable to heap-based buffer overflow, which may cause a denial-of-service condition or remotely execute arbitrary code.
Timeline
dates in UTC- 2022-05-0517:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-38439?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-38439?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| — | all versions | no fix published | NVD |
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.
Vendor advisories
Multiple Data Distribution Service (DDS) Implementations (Update A)
RTI Connext DDS Micro: Versions 3.0.0 and later · Object Computing Inc. (OCI) OpenDDS: All versions prior to 3.18.1 · Real-Time Innovations (RTI) Connext DDS Professional and Connext DDS Secure: Versions 4.2x to 6.1.0 · +4 more
Fix
- Mitigation from the vendor CISA ICSA-21-315-02 · 7 productsEclipse recommends users apply the latest CycloneDDS patches.
- Mitigation from the vendor CISA ICSA-21-315-02 · 7 productseProsima recommends users apply the latest Fast DDS patches.
- Mitigation from the vendor CISA ICSA-21-315-02 · 7 productsOCI recommends users update to Version 3.18.1 of OpenDDS or later.
- Mitigation from the vendor CISA ICSA-21-315-02 · 7 productsTwin Oaks Computing recommends users apply CoreDX DDS Version 5.9.1 or later, which can be downloaded on the Twin Oaks website (login required).
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2022-05-05
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-38439?
Is CVE-2021-38439 actively exploited?
What is the CVSS score for CVE-2021-38439?
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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.