CVE-2026-40943— Oxia: Server crash via race condition in session heartbeat handling
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I. Basic Information for CVE-2026-40943
Vulnerability Information
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Vulnerability Title
Oxia: Server crash via race condition in session heartbeat handling
Source: NVD (National Vulnerability Database)
Vulnerability Description
Oxia is a metadata store and coordination system. Prior to 0.16.2, a race condition between session heartbeat processing and session closure can cause the server to panic with send on closed channel. The heartbeat() method uses a blocking channel send while holding a mutex, and under specific timing with concurrent close() calls, this can lead to either a deadlock (channel buffer full) or a panic (send on closed channel after TOCTOU gap in KeepAlive). This vulnerability is fixed in 0.16.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: NVD (National Vulnerability Database)
Vulnerability Title
oxia 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
oxia是Oxia开源的一个分布式元数据存储与协调系统。 Oxia 0.16.2之前版本存在竞争条件问题漏洞，该漏洞源于会话心跳处理和会话关闭之间存在竞争条件，可能导致服务器因在已关闭通道上发送而崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40943
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Same Patch Batch · oxia-db · 2026-04-21 · 4 CVEs total
| CVE-2026-40945 | Oxia: Bearer token exposed in debug log messages on authentication failure | |
| CVE-2026-40944 | Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles | |
| CVE-2026-40946 | Oxia: OIDC token audience validation bypass via SkipClientIDCheck |
IV. Related Vulnerabilities
V. Comments for CVE-2026-40943
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