Vulnerability · Published Jul 14, 2026 · Assigned by blackberry
CVE-2026-4018TOCTOU race condition in the QNX Neutrino kernel impacts versions of the QNX Software Development Platform and QNX OS for Safety
Medium 6.4
In plain English
A medium-severity security flaw in QNX OS for Medical from BlackBerry Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.1%top 99.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
TOCTOU Race Condition in specific trace commands of the TraceEvent() system call could allow an attacker with local access and with the PROCMGR_AID_TRACE ability, to cause information disclosure, data tampering or a crash of the QNX Neutrino kernel.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| BlackBerry Ltd | QNX Software Development Platform | 7.1cpe:2.3:a:blackberry:qnx_software_development_platform:7.1:*:*:*:*:*:*:*7.0cpe:2.3:a:blackberry:qnx_software_development_platform:7.0:*:*:*:*:*:*:* |
| BlackBerry Ltd | QNX OS for Safety | 2.2.8 and earliercpe:2.3:o:blackberry:qnx_os_for_safety:2.2:8:*:*:*:*:*:*2.1.5 and earliercpe:2.3:o:blackberry:qnx_os_for_safety:2.1:5:*:*:*:*:*:*2.0.3 and earliercpe:2.3:o:blackberry:qnx_os_for_safety:2.0:3:*:*:*:*:*:* |
| BlackBerry Ltd. | QNX OS for Medical | 2.0.2 and earliercpe:2.3:o:blackberry:qnx_os_for_medical:2.0:2:*:*:*:*:*:* |
Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H