PT-2026-34187 · Oxia · Oxia

Published 2026-04-14 · Updated 2026-04-26 · CVE-2026-40943

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Oxia versions prior to 0.16.2

Description A race condition exists between session heartbeat processing and session closure. The heartbeat() method utilizes a blocking channel send while holding a mutex. Under specific timing with concurrent close() calls, this can result in a deadlock if the channel buffer is full, or a server panic due to a send on a closed channel following a Time-of-Check to Time-of-Use (TOCTOU) gap in KeepAlive. TOCTOU is a software bug where a system checks the state of a resource before using it, but the state changes between the check and the use.

Recommendations Update to version 0.16.2.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-40943

GHSA-5GQC-QHRJ-9XW8

Affected Products

Oxia

References · 5

• https://osv.dev/vulnerability/GHSA-5gqc-qhrj-9xw8 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40943 · Security Note
• https://github.com/oxia-db/oxia/security/advisories/GHSA-5gqc-qhrj-9xw8 · Note
• https://github.com/oxia-db/oxia · Note
• https://twitter.com/CVEnew/status/2048481096744976545 · Twitter Post