GHSA-jj6p-3m75-g2p3 (CVE-2025-66622)

Details

The matrix-sdk-base crate is 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.

Patches

The issue is fixed in matrix-sdk-base 0.16.0.

Workarounds

Users can leave affected rooms on another client to mitigate the issue.

References

The issue was fixed in https://github.com/matrix-org/matrix-rust-sdk/pull/5924.

Affected Packages

matrix-sdk-base

crates.io

Fixed in:

0.16.0

References

ADVISORYhttps://github.com/advisories/GHSA-jj6p-3m75-g2p3 PACKAGEhttps://github.com/matrix-org/matrix-rust-sdk WEBhttps://github.com/matrix-org/matrix-rust-sdk/commit/4ea0418abefab2aa93f8851a4d39c723e703e6b0 WEBhttps://github.com/matrix-org/matrix-rust-sdk/pull/5924 WEBhttps://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-jj6p-3m75-g2p3 ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-66622 WEBhttps://rustsec.org/advisories/RUSTSEC-2025-0135.html

GHSA-jj6p-3m75-g2p3

Details

Patches

Workarounds

References

Affected Packages

References

Aliases

CVSS Analysis

Related

Ecosystems

Timeline