Description
The Matrix specification before 1.16 (i.e., with a room version before 12 and State Resolution before 2.1) has deficient state resolution.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Matrix | Matrix specification | < 1.16 | 1.16 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | matrix-synapse | 1.136.0-1.1 | openSUSE-SU-2025:15436-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | synapse | 1.135.1-r0 | — |
| Alpine v3.23 | synapse | 1.135.1-r0 | — |
| Alpine v3.22 | synapse | 1.135.1-r0 | — |
Advisories 1
- openSUSE-SU-2025:15436-1 matrix-synapse-1.136.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026