Vulnerability Description
matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Matrix-Rust-Sdk | < 0.16.0 |
Related Weaknesses (CWE)
References
- https://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d3Patch
- https://github.com/matrix-org/matrix-rust-sdk/pull/5924Issue TrackingPatch
- https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75PatchVendor Advisory
- https://rustsec.org/advisories/RUSTSEC-2025-0135.htmlThird Party Advisory
FAQ
What is CVE-2025-66622?
CVE-2025-66622 is a vulnerability with a CVSS score of 7.5 (HIGH). matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug...
How severe is CVE-2025-66622?
CVE-2025-66622 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66622?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Matrix-Rust-Sdk.