UBUNTU-CVE-2025-62603

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Source
https://ubuntu.com/security/CVE-2025-62603
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-62603.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-62603
Upstream
Published
2026-02-03T20:15:00Z
Modified
2026-02-23T07:02:43.049947Z
Severity
  • 1.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group ). ParticipantGenericMessage is the DDS Security control-message container that carries not only the handshake but also on going security-control traffic after the handshake, such as crypto-token exchange, rekeying, re-authentication, and token delivery for newly appearing endpoints. On receive, the CDR parser is invoked first and deserializes the message_data (i .e., the DataHolderSeq) via the readParticipantGenericMessage → readDataHolderSeq path. The DataHolderSeq is parsed sequentially: a sequence count (uint32), and for each DataHolder the class_id string (e.g. DDS:Auth:PKI-DH:1.0+Req), string properties (a sequence of key/value pairs), and binary properties (a name plus an octet-vector). The parser operat es at a stateless level and does not know higher-layer state (for example, whether the handshake has already completed), s o it fully unfolds the structure before distinguishing legitimate from malformed traffic. Because RTPS permits duplicates, delays, and retransmissions, a receiver must perform at least minimal structural parsing to check identity and sequence n umbers before discarding or processing a message; the current implementation, however, does not "peek" only at a minimal header and instead parses the entire DataHolderSeq. As a result, prior to versions 3.4.1, 3.3.1, and 2.6.11, this parsi ng behavior can trigger an out-of-memory condition and remotely terminate the process. Versions 3.4.1, 3.3.1, and 2.6.11 p atch the issue.

References

Affected packages

Ubuntu:Pro:22.04:LTS / fastdds

Package

Name
fastdds
Purl
pkg:deb/ubuntu/fastdds@2.5.0+ds-3ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.0+ds-9
2.4.1+ds-1
2.5.0+ds-3
2.5.0+ds-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fastdds-tools",
            "binary_version": "2.5.0+ds-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libfastrtps-dev",
            "binary_version": "2.5.0+ds-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libfastrtps2.5",
            "binary_version": "2.5.0+ds-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-62603.json"

Ubuntu:24.04:LTS / fastdds

Package

Name
fastdds
Purl
pkg:deb/ubuntu/fastdds@2.11.2+ds-6.1build3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.10.1+ds-3
2.11.2+ds-6
2.11.2+ds-6ubuntu1
2.11.2+ds-6.1build2
2.11.2+ds-6.1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fastdds-tools",
            "binary_version": "2.11.2+ds-6.1build3"
        },
        {
            "binary_name": "libfastrtps-dev",
            "binary_version": "2.11.2+ds-6.1build3"
        },
        {
            "binary_name": "libfastrtps2.11t64",
            "binary_version": "2.11.2+ds-6.1build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-62603.json"

Ubuntu:25.10 / fastdds

Package

Name
fastdds
Purl
pkg:deb/ubuntu/fastdds@3.1.2+ds-1build1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.1.2+ds-1
3.1.2+ds-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fastdds-tools",
            "binary_version": "3.1.2+ds-1build1"
        },
        {
            "binary_name": "libfastdds-dev",
            "binary_version": "3.1.2+ds-1build1"
        },
        {
            "binary_name": "libfastdds3.1",
            "binary_version": "3.1.2+ds-1build1"
        },
        {
            "binary_name": "libfastrtps-dev",
            "binary_version": "3.1.2+ds-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-62603.json"