CVE-2026-35092
Publication date 1 April 2026
Last updated 13 April 2026
Ubuntu priority
Description
A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| corosync | 25.10 questing |
Fixed 3.1.9-2ubuntu1.1
|
| 24.04 LTS noble |
Fixed 3.1.7-1ubuntu3.2
|
|
| 22.04 LTS jammy |
Fixed 3.1.6-1ubuntu1.2
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-8170-1
- Corosync vulnerabilities
- 13 April 2026