CVE-2025-67108: eProsima Fast-DDS v3.3 was discovered to contain improper validation for ticket revocation, resulting in insec

This month

CRITICAL 10.0REMOTEDOWNGRADE

CVE-2025-67108 is a critical-severity flaw (CVSS 10.0) affecting fast dds. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eProsima Fast-DDS v3.3 was discovered to contain improper validation for ticket revocation, resulting in insecure communications and connections.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-298, CWE-370
Published	2025-12-23
Last modified	2026-10-26

Publisher (CNA): MITRE · Vendor: eprosima

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-23 16:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

eprosima fast dds DOWNGRADE

Affected: 3.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.0

1. Check installed version

apt-cache policy fast-dds || rpm -q fast-dds || fast-dds --version

2. No fixed release: DOWNGRADE to a release before 3.3.0 (Debian / Ubuntu)

apt-cache madison fast-dds sudo apt install fast-dds=<VERSION_BEFORE_3.3.0> sudo apt-mark hold fast-dds

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fast-dds sudo dnf downgrade fast-dds-<VERSION_BEFORE_3.3.0> sudo dnf versionlock add fast-dds

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-67108?

fast dds: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-67108 being exploited?

CVE-2025-67108 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-2025-67108 affect?

CVE-2025-67108 affects fast dds. Severity is critical (CVSS 10.0). eProsima Fast-DDS v3.3 was discovered to contain improper validation for ticket revocation, resulting in insecure communications and connections.

How urgent is CVE-2025-67108?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

References

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