A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade corosynclibUpgrade spauseddUpgrade corosync-vqsimUpgrade corosyncUpgrade corosynclib-devel | May 6, 2026 | May 5, 2026 |
| Amazon_linux_2023 | — | Upgrade corosync-vqsim-debuginfoUpgrade corosync-debugsourceUpgrade corosync-vqsimUpgrade corosync-debuginfoUpgrade corosynclib-develUpgrade corosynclib-debuginfoUpgrade corosynclibUpgrade corosync | Apr 14, 2026 | Apr 1, 2026 |
| Debian | — | Upgrade corosync | May 12, 2026 | May 12, 2026 |
| Oracle_linux | — | Upgrade corosyncUpgrade corosynclibUpgrade corosync-vqsim | May 8, 2026 | Apr 1, 2026 |
| Redhat_linux | — | Upgrade spauseddUpgrade corosynclibUpgrade corosyncUpgrade corosync-vqsimUpgrade corosync-debuginfoUpgrade corosynclib-debuginfoUpgrade corosync-debugsourceUpgrade corosynclib-develUpgrade corosync-vqsim-debuginfoUpgrade spausedd-debuginfoUpgrade corosync-qnetdUpgrade corosync-qdevice | May 7, 2026 | Apr 1, 2026 |
| Rocky_linux | — | Upgrade corosynclibUpgrade corosync-vqsimUpgrade corosynclib-debuginfoUpgrade corosync-debugsourceUpgrade corosynclib-develUpgrade spauseddUpgrade corosync-vqsim-debuginfoUpgrade spausedd-debuginfoUpgrade corosyncUpgrade corosync-debuginfo | May 11, 2026 | May 6, 2026 |
| Ubuntu | — | Upgrade corosync | Apr 14, 2026 | Apr 1, 2026 |
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