CVE-2021-38439: All versions of GurumDDS are vulnerable to heap-based buffer overflow, which may cause a denial-of-service con

This month

HIGH 8.6REMOTEMITIGATE

CVE-2021-38439 is a high-severity flaw (CVSS 8.6) affecting gurumdds. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All versions of GurumDDS are vulnerable to heap-based buffer overflow, which may cause a denial-of-service condition or remotely execute arbitrary code.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-122
Published	2022-05-05
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: gurum

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-05 17:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

gurum gurumdds MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gurumdds || rpm -q gurumdds || gurumdds --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-38439?

gurumdds: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-38439 being exploited?

CVE-2021-38439 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-38439 affect?

CVE-2021-38439 affects gurumdds. Severity is high (CVSS 8.6). All versions of GurumDDS are vulnerable to heap-based buffer overflow, which may cause a denial-of-service condition or remotely execute arbitrary code.

How urgent is CVE-2021-38439?

Priority 57/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-38423 MEDIUM 6.6 MITIGATE All versions of GurumDDS improperly calculate the size to be used when allocating the buffer, which may result

References

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