CVE-2026-40943

Oxia: Server crash via race condition in session heartbeat handling

HIGH

8.7

CVSS Score

Published: April 21, 2026 at 09:13 PM UTC

Updated: June 17, 2026 at 10:45 AM UTC

1 product affected across 1 vendorOxia

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Severity

HIGH8.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Oxia · Oxia DB

60%

v < 0.16.2

Affected range stops below 0.16.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

https://github.com/oxia-db/oxia/security/advisories/GHSA-5gqc-qhrj-9xw8

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-362

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