CVE-2026-40943: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in oxia-db oxia
CVE-2026-40943 is a high-severity race condition vulnerability in oxia, a metadata store and coordination system. Versions prior to 0. 16. 2 have a concurrency issue between session heartbeat processing and session closure. This can cause the server to panic due to sending on a closed channel or deadlock when the heartbeat method blocks while holding a mutex. The vulnerability is fixed in version 0. 16. 2.
AI Analysis
Technical Summary
Oxia versions before 0.16.2 suffer from a race condition (CWE-362) involving concurrent execution using shared resources without proper synchronization. Specifically, the heartbeat() method performs a blocking send on a channel while holding a mutex. If a concurrent close() call occurs, this can lead to either a deadlock (if the channel buffer is full) or a panic caused by sending on a closed channel due to a time-of-check-to-time-of-use (TOCTOU) gap in the KeepAlive mechanism. This concurrency flaw can cause server instability or crashes. The issue is resolved in oxia version 0.16.2.
Potential Impact
Exploitation of this vulnerability can cause the oxia server to panic or deadlock, leading to denial of service conditions. There is no indication of privilege escalation or data compromise, but service availability is impacted. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade oxia to version 0.16.2 or later, where this race condition vulnerability has been fixed. Patch status is not explicitly stated in vendor advisory fields, but the description confirms the fix in 0.16.2. Until upgrading, be aware of potential server instability due to this concurrency issue.
CVE-2026-40943: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in oxia-db oxia
Description
CVE-2026-40943 is a high-severity race condition vulnerability in oxia, a metadata store and coordination system. Versions prior to 0. 16. 2 have a concurrency issue between session heartbeat processing and session closure. This can cause the server to panic due to sending on a closed channel or deadlock when the heartbeat method blocks while holding a mutex. The vulnerability is fixed in version 0. 16. 2.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Oxia versions before 0.16.2 suffer from a race condition (CWE-362) involving concurrent execution using shared resources without proper synchronization. Specifically, the heartbeat() method performs a blocking send on a channel while holding a mutex. If a concurrent close() call occurs, this can lead to either a deadlock (if the channel buffer is full) or a panic caused by sending on a closed channel due to a time-of-check-to-time-of-use (TOCTOU) gap in the KeepAlive mechanism. This concurrency flaw can cause server instability or crashes. The issue is resolved in oxia version 0.16.2.
Potential Impact
Exploitation of this vulnerability can cause the oxia server to panic or deadlock, leading to denial of service conditions. There is no indication of privilege escalation or data compromise, but service availability is impacted. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade oxia to version 0.16.2 or later, where this race condition vulnerability has been fixed. Patch status is not explicitly stated in vendor advisory fields, but the description confirms the fix in 0.16.2. Until upgrading, be aware of potential server instability due to this concurrency issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-15T20:40:15.519Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e7e91619fe3cd2cdfaec56
Added to database: 4/21/2026, 9:16:06 PM
Last enriched: 4/21/2026, 9:31:02 PM
Last updated: 4/22/2026, 12:01:28 AM
Views: 8
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