Packages
- corosync - cluster engine daemon and utilities
Details
It was discovered that Corosync incorrectly handled the membership commit
token validity check. A remote attacker could use this issue to cause
Corosync to crash, resulting in a denial of service, or to possibly obtain
a small quantity of sensitive information. (CVE-2026-35091)
It was discovered that Corosync incorrectly handled join message
validation. A remote attacker could possibly use this issue to cause
Corosync to crash, resulting in a denial of service. (CVE-2026-35092)
It was discovered that Corosync incorrectly handled the membership commit
token validity check. A remote attacker could use this issue to cause
Corosync to crash, resulting in a denial of service, or to possibly obtain
a small quantity of sensitive information. (CVE-2026-35091)
It was discovered that Corosync incorrectly handled join message
validation. A remote attacker could possibly use this issue to cause
Corosync to crash, resulting in a denial of service. (CVE-2026-35092)
Update instructions
After a standard system update you need to restart Corosync to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | corosync – 3.1.9-2ubuntu1.1 | ||
| 24.04 LTS noble | corosync – 3.1.7-1ubuntu3.2 | ||
| 22.04 LTS jammy | corosync – 3.1.6-1ubuntu1.2 | ||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.