QNX Software Development Platform: Stack-based Buffer Overflow
CVE-2026-4017 is a high-severity stack-based buffer overflow vulnerability in QNX Software Development Platform from BlackBerry, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, without any action from a user. Affected QNX Software Development Platform versions: 7.1; 7.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.14% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of QNX Software Development Platform you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| BlackBerry | QNX Software Development Platform | 7.1; 7.0 | Not stated |
| BlackBerry | QNX OS for Safety | 2.2.8 and earlier; cpe:2.3:o:blackberry:qnx_os_for_safety:2.2:8:*:*:*:*:*:*; 2.1.5 and earlier; cpe:2.3:o:blackberry:qnx_os_for_safety:2.1:5:*:*:*:*:*:*; 2.0.3 and earlier; cpe:2.3:o:blackberry:qnx_os_for_safety:2.0:3:*:*:*:*:*:* | Not stated |
| BlackBerry | QNX OS for Medical | 2.0.2 and earlier; cpe:2.3:o:blackberry:qnx_os_for_medical:2.0:2:*:*:*:*:*:* | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (blackberry.com).
Official description
Buffer Overflow in the entry handler of the TraceEvent() system call could allow an attacker with local access to cause information disclosure, data tampering or a crash of the QNX Neutrino kernel.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Stack-based Buffer Overflow
The product writes past the end of a buffer that was allocated on the stack.
How developers prevent this class of flaw
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.
- Use an abstraction library to abstract away risky APIs. Not a complete solution.
- Implement and perform bounds checking on input.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in QNX Software Development Platform
- 7.4 High severity
- 8.4 High severity
- 7.0 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
Recent Stack-based Buffer Overflow vulnerabilities
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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