Fedora 42 update for matrix-synapse



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-30355
CWE-ID CWE-20
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
 Fedora
Operating systems & Components / Operating system

matrix-synapse
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Input validation error

EUVDB-ID: #VU106284

Risk: High

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-30355

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user can pass specially crafted events to the application and prevent it from federating with other servers.

Note, the vulnerability is being exploited in the wild.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 42

matrix-synapse: before 1.127.1-1.fc42

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2025-63751ef564


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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