Vulnerability in Blackberry Ltd Qnx OS For Safety
CVE-2026-4018
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.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (0.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Blackberry Ltd Qnx OS For Safety — versions 2.2.8 and earlier, cpe:2.3:o:blackberry:qnx_os_for_safety:2.2:8:*:*:*:*:*:*, 2.1.5 and earlier
- Blackberry Ltd Qnx Software Development Platform — versions 7.1, cpe:2.3:a:blackberry:qnx_software_development_platform:7.1:*:*:*:*:*:*:*, 7.0
- Blackberry Ltd. Qnx OS For Medical — versions 2.0.2 and earlier, cpe:2.3:o:blackberry:qnx_os_for_medical:2.0:2:*:*:*:*:*:*
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-4018?
- CVE-2026-4018 is a medium-severity vulnerability in Blackberry Ltd Qnx OS For Safety, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2026-07-14.
- How severe is CVE-2026-4018?
- Medium severity. CVSS v3 base score is 6.4 out of 10.