Critical severity · published Feb 3, 2026
CVE-2025-62799
FastDDS's heap buffer overflow in RTPS DATA_FRAG enables unauthenticated DoS (potential RCE)
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group
). Prior to versions 3.4.1, 3.3.1, and 2.6.11, a heap buffer overflow exists in the Fast-DDS DATA_FRAG receive path. An un
authenticated sender can transmit a single malformed RTPS DATA_FRAG packet where `fragmentSize` and `sampleSize` are craft
ed to violate internal assumptions. Due to a 4-byte alignment step during fragment metadata initialization, the code write
s past the end of the allocated payload buffer, causing immediate crash (DoS) and potentially enabling memory corruption (
RCE risk). Versions 3.4.1, 3.3.1, and 2.6.11 patch the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FA
Fast-DDS · eProsima
3.4.0 before 3.4.1; 3.0.0 before 3.3.1; before 2.6.11 · source: vendor
DL
Debian Linux · Debian
11.0; 12.0; 13.0 · source: NVD
FD
Fast Dds · Eprosima
before 2.6.11; 3.0.0 before 3.3.1; 3.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62799
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-62799
Patch
https://github.com/eProsima/Fast-DDS/commit/0c3824ef4991628de5dfba240669dc6172d63b46
Patch
https://github.com/eProsima/Fast-DDS/commit/955c8a15899dc6eb409e080fe7dc89e142d5a514
Patch
https://github.com/eProsima/Fast-DDS/commit/d6dd58f4ecd28cd1c3bc4ef0467be9110fa94659
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2025-62799
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