CVE-2023-50257 [Critical] | Security Vulnerability in Fast Dds

eProsima Fast DDS (formerly Fast RTPS) is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Even with the application of SROS2, due to the issue where the data (`p[UD]`) and `guid` values used to disconnect between nodes are not encrypted, a vulnerability has been discovered where a malicious attacker can forcibly disconnect a Subscriber and can deny a Subscriber attempting to connect. Afterwards, if the attacker sends the packet for disconnecting, which is data (`p[UD]`), to the Global Data Space (`239.255.0.1:7400`) using the said Publisher ID, all the Subscribers (Listeners) connected to the Publisher (Talker) will not receive any data and their connection will be disconnected. Moreover, if this disconnection packet is sent continuously, the Subscribers (Listeners) trying to connect will not be able to do so. Since the initial commit of the `SecurityManager.cpp` code (`init`, `on_process_handshake`) on Nov 8, 2016, the Disconnect Vulnerability in RTPS Packets Used by SROS2 has been present prior to versions 2.13.0, 2.12.2, 2.11.3, 2.10.3, and 2.6.7.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-01-03	0.07%	0.20%	+0.13%
2	2025-11-21	0.15%	0.07%	-0.08%
3	2025-11-18	—	0.15%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-01-03

0.07%

0.20%

+0.13%

2025-11-21

0.15%

0.07%

-0.08%

2025-11-18

—

0.15%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.6	3.1	CRITICAL	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	6.0	[email protected]
8.1	3.1	HIGH	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.2	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.6

3.1

CRITICAL

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

6.0

[email protected]

8.1

3.1

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Click to expand

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.2

[email protected]

OS Trackers for CVE-2023-50257

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2023-50257 not yet assigned priority: Debian including 1 source packages (fastdds), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2.	https://security-tracker.debian.org/tracker/CVE-2023-50257
`ubuntu`	medium	CVE-2023-50257 medium priority: Ubuntu including 1 source packages (fastdds), 7 status rows across 7 suites (focal, jammy, noble, oracular, plucky, questing, upstream): not-affected 3, needs-triage 2, DNE 1, released 1.	https://ubuntu.com/security/CVE-2023-50257

Affected software / configurations for CVE-2023-50257

Vendor	Product	Version	Raw CPE
eprosima	fast_dds	< 2.6.7	cpe:2.3:a:eprosima:fast_dds::::::::
eprosima	fast_dds	>= 2.10.0, < 2.10.3	cpe:2.3:a:eprosima:fast_dds::::::::
eprosima	fast_dds	>= 2.11.0, < 2.11.3	cpe:2.3:a:eprosima:fast_dds::::::::
eprosima	fast_dds	>= 2.12.0, < 2.12.2	cpe:2.3:a:eprosima:fast_dds::::::::

References for CVE-2023-50257

URL	Tags
https://github.com/eProsima/Fast-DDS/commit/072cbc9d6a71d869a5cbed1873c0cdd6cf67cda4	Patch
https://github.com/eProsima/Fast-DDS/commit/e1869863c06db7fbb366ae53760fbe6e754be026	Patch
https://github.com/eProsima/Fast-DDS/commit/f07a0213e655202188840b864be4438ae1067a13	Patch
https://github.com/eProsima/Fast-DDS/commit/f2e5ceae8fbea0a6c9445a366faaca0b98a8ef86	Patch
https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-v5r6-8mvh-cp98	Vendor Advisory Patch

URL

CVE-2023-50257 | Disconnect Vulnerability in RTPS Packets Used by SROS2

Exploit prediction scoring system (EPSS) score for CVE-2023-50257

Common vulnerability scoring system (CVSS) metrics for CVE-2023-50257

Weakness enumeration for CVE-2023-50257

OS Trackers for CVE-2023-50257

Affected software / configurations for CVE-2023-50257

References for CVE-2023-50257