*** Aerospike Support Alert - May 5, 2026 ***
*** Aerospike XDR Stackoverflow ***
Issue: A critical issue has been identified in Aerospike’s XDR (Cross-Datacenter Replication) component that can lead to a stack overflow, resulting in node instability or crashes.
Affected Releases:
| Major Release | Vulnerable Version Range | Minimum Fixed Version |
| Aerospike 8 | 8.1.1.0 - 8.1.1.2 8.1.0.0 - 8.1.0.3 8.0.0.3 - 8.0.0.14 | 8.1.2.0 8.1.2.0 8.0.0.15 |
| Aerospike 7 | 7.2.0.8 - 7.2.0.16 7.1.0.14 - 7.1.0.22 7.0.0.11 - 7.0.0.26 | 7.2.0.17 7.1.0.23 7.1.0.23 |
| Aerospike 6 | 6.4.0.30 - 6.4.0.33 6.3.0.35 6.2.0.37 6.1.0.47 | 6.4.0.34 6.3.0.36 6.3.0.36 6.3.0.36 |
| Legacy (< 6.1) | All versions prior to 6.1.0.47 | N/A |
Background: A critical issue in Aerospike (specifically AER-6898) has been identified as the root cause of intermittent Aerospike node crashes. Impacted clusters may experience sudden node crashes, when a partition changes state.
Immediate Actions: If you are using the affected versions, you should upgrade immediately.
Detailed Description: A logic error in the XDR subsystem results in a stack overflow. Specifically, when a node transitions from prole to master with a high retry-queue count, the system attempts to allocate a stack-based variable-length array (VLA) based on a negative integer. This results in an inaccurate stack allocation, immediately exceeding the 8MB stack limit which leads to potential memory corruption and a crash of the node.
If you have questions or concerns, don't hesitate to contact Aerospike Support by opening a ticket in the Aerospike Support Portal.
Thank you,
Aerospike Support