CVE-2026-14256

Executive Summary

CVE-2026-14256 is an unpatched memory-safety vulnerability in the ELAN TrackPoint driver that can be triggered by a local authenticated user to cause a system crash. The NVD description characterizes the flaw as a potential out-of-bounds write, while the assigned CWE (CWE-125) describes an out-of-bounds read — this discrepancy in the public record is noted but does not change the impact profile. The vulnerability carries a CVSS score of 4.7 (MODERATE), with impact confined to availability (A:H) and no impact on confidentiality or integrity. No patch, no public exploit, and no in-the-wild exploitation have been identified; the EPSS score of 0.00088 places this CVE in the lowest exploitation-probability percentile.

Technical Analysis

The NVD description states: "ELAN reported a potential out-of-bounds write vulnerability in the ELAN TrackPoint driver that, under certain circumstances, could allow a local authenticated user to cause a system crash." This is a sparse description, and the CVE record contains no CNA title, no affected version list, no vendor advisory, and no patch information. Consequently, the technical analysis below is derived strictly from the vulnerability class and the CVSS vector.

The affected component is a kernel-mode driver for ELAN TrackPoint hardware. TrackPoint drivers act as input devices, receiving pointer data and translating it for the operating system's input stack. Kernel-mode drivers that fail to validate the length of incoming data before copying it into fixed-size buffers are susceptible to out-of-bounds memory access. In this case, the flaw class is a boundary-validation failure: a malformed input report, an unexpected buffer size, or a crafted request to the driver's device interface could cause the driver to read or write outside the bounds of an allocated structure.

Because the driver executes in kernel context, any out-of-bounds access can corrupt adjacent kernel heap memory (pool). In the worst case, this corruption manifests as a bug check (e.g., a Windows blue screen), which is consistent with the reported impact of "system crash." The high attack complexity component (AC:H) of the CVSS vector suggests that triggering the flaw requires uncommon conditions — for example, a specific input sequence, a particular driver state, or a race window. The low privilege requirement (PR:L) confirms that any authenticated local user is a potential attacker; no administrative rights are needed. The absence of user interaction (UI:N) means no victim action is required beyond the attacker triggering the defect.

It is important to flag the inconsistency between the description ("out-of-bounds write") and the assigned CWE-125 ("Out-of-bounds Read"). This report treats the issue at the class level as an out-of-bounds memory access in a kernel driver. Without a patch or detailed advisory, the exact vulnerable code path and triggering mechanism cannot be positively confirmed. No function names, IOCTL codes, device paths, or driver file names are disclosed in the public record, and none are asserted here.

From an attack-surface perspective, the driver is present on enterprise workstations and laptops that ship with ELAN TrackPoint input hardware. The attack surface is local: the attacker must already have a local account on the target system and must be able to interact with the driver's input interface. The driver is not directly network-exposed, meaning remote exploitation is not viable without a prior foothold.

Exploitation Scenarios

Because no public PoC, exploit code, or technical write-up exists for CVE-2026-14256, the attack chain below is inferred from the vulnerability class and the NVD description. It is offered as a candidate chain, not a confirmed procedure.

1. Reconnaissance / target identification: An authenticated local user identifies a system running the ELAN TrackPoint driver. This can be accomplished with standard operating-system enumeration facilities — e.g., listing loaded kernel drivers — without any special tooling. Multi-user endpoints such as shared workstations, lab machines, kiosks, or VDI sessions that pass through local input devices are the most plausible targets, as they provide the low-privilege account required by the CVSS vector.

2. Triggering the flaw: The attacker submits crafted input to the ELAN TrackPoint driver's input-handling path — for example, a malformed pointer report with an unexpected length or a sequence of data that places the driver in an unexpected state. The exact payload is unknown because no technical details have been published; however, the flaw class (out-of-bounds access due to missing bounds validation) implies that a controlled, incomplete, or oversized input buffer is involved.

3. Payload / execution method (class level): The malformed input causes the driver to write (or read) beyond the boundary of an allocated buffer. Since the driver operates in kernel mode, the resulting memory corruption destabilizes the kernel, typically producing a bug check and immediate system reboot. There is no evidence that the corruption can be weaponized for arbitrary code execution; the CVSS vector scores confidentiality and integrity impact as NONE (C:N/I:N), indicating the practical outcome is denial of service.

4. Post-exploitation impact: The system crashes and reboots. The attacker can repeat the trigger on every boot, creating a persistent localized denial-of-service condition. Because the attacker only needs low privileges, a single unprivileged account can repeatedly deny service to all other users of the machine. No data theft, privilege escalation, or persistent implant is indicated by the available data.

Note: No public PoC is available; the attack chain is inferred from the vulnerability class. Attempts to trigger this flaw for testing should only be performed in an isolated lab environment with crash-dump collection enabled.

Impact Assessment

The CVSS v3.1 base score is 4.7 (MODERATE). The vector — AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H — breaks down as follows: local attack vector, high attack complexity, low privileges required, no user interaction, scope unchanged, no confidentiality impact, no integrity impact, and high availability impact. The availability subscore (A:H) is the sole driver of the severity and reflects the system-crash outcome.

Blast radius: The affected driver is expected to be present on ELAN-equipped laptops and any enterprise fleet that uses these input devices. However, the practical exposure is limited by the requirements of a local account and high attack complexity. Systems in shared or multi-user environments present the largest real-world risk, since any low-privileged user on the machine can potentially crash it. Single-user, physically secured endpoints are lower risk because the attacker would need to be that same authenticated user, who could already reboot the machine — though the vulnerability still enables a crash without legitimate reboot semantics, which may bypass audit controls.

The EPSS score of 0.00088 (0.5th percentile of exploited CVEs) indicates a very low likelihood of exploitation in the near term. CVE-2026-14256 is not listed in the CISA Known Exploited Vulnerabilities catalog, and no threat-actor campaigns or exploit-in-the-wild evidence have been associated with it. Despite the low severity, the complete absence of a patch means all affected installations remain exposed indefinitely. Business impact is best characterized as a localized availability risk: any unpatched system with the driver is a potential victim of a nuisance-level or targeted DoS by an insider or a low-privilege foothold.

Detection Guidance

Network-based detection is inherently limited for this vulnerability because the flaw is purely local and is triggered through a kernel driver interface rather than network traffic. The rules below therefore focus on host-based telemetry: driver installation/load events, system crash (bug check) reporting, and Windows Error Reporting (WER) data. These rules should be treated as hunting rules, not as a reliable confirmation of exploitation, because the only documented symptom is a system crash.

Sigma Rule

title: ELAN TrackPoint Driver Load or Crash Indicator
id: 9a1c2d3e-4f5a-4b6c-8d7e-1f2a3b4c5d6e
status: experimental
description: Detects installation/load of the ELAN TrackPoint kernel driver, or system crash events referencing ELAN components, which may indicate attempts to trigger CVE-2026-14256 or general driver instability.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2026-14256
author: valtersit.com
date: 2026/06/01
logsource:
    product: windows
    service: system
detection:
    selection_new_driver:
        EventID: 7045
        ServiceName|contains: ELAN
    selection_crash:
        EventID:
            - 1001
            - 6008
        Message|contains: ELAN
    condition: selection_new_driver or selection_crash
falsepositives:
    - Legitimate ELAN driver updates and installations
    - Unrelated system crashes on machines that happen to have the ELAN driver present
level: medium

YARA Rule

rule CVE_2026_14256_ELAN_TrackPoint_Hunt
{
    meta:
        author = "valtersit.com"
        description = "Hunting rule for ELAN TrackPoint driver images potentially affected by CVE-2026-14256"
        cve = "CVE-2026-14256"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-14256"
    strings:
        $s1 = "ELAN" ascii wide
        $s2 = "TrackPoint" ascii wide
        $s3 = "TrackPoint Driver" ascii wide
    condition:
        uint16(0) == 0x5A4D and any of ($s*) and filesize < 5MB
}

Suricata IDS Rule

The following rule detects network delivery of files or archives whose names reference the ELAN TrackPoint driver. This is a supplementary hunting rule; the vulnerability itself is local and generates no distinctive network signature.

alert http any any -> any any (msg:"Potential ELAN TrackPoint Driver or Exploit Archive Download"; flow:established,to_client; file.name; content:"ELAN"; nocase; content:"TrackPoint"; nocase; classtype:attempted-dos; sid:202614256; rev:1;)

Elastic Detection

The following EQL correlation identifies a new ELAN driver service registration followed by a system crash event on the same host within a 15-minute window.

sequence by host.name with maxspan=15m
  [ any where event.code == "7045" and wildcard(winlog.event_data.ServiceName, "*ELAN*") ]
  [ any where event.code in ("1001", "6008") and wildcard(message, "*ELAN*") ]

Splunk SPL Query

(index=windows EventCode=7045 ServiceName=*ELAN*) OR (index=windows (EventCode=1001 OR EventCode=6008) Message=*ELAN*)
| stats count min(_time) as first_seen max(_time) as last_seen by host, source, EventCode, ServiceName, Message
| eval timespan=tostring(max(_time)-min(_time), "duration")
| sort - count

Wazuh OSSEC Rule

<group name="windows,sysmon,elantrackpoint,">
  <rule id="100255" level="10">
    <if_sid>60005</if_sid>
    <field name="win.system.eventID">7045</field>
    <match>ELAN</match>
    <description>ELAN TrackPoint driver installed or loaded - potential CVE-2026-14256 exposure</description>
    <group>kernel_driver,</group>
  </rule>
  <rule id="100256" level="8">
    <if_sid>60005</if_sid>
    <field name="win.system.eventID">1001</field>
    <match>ELAN</match>
    <description>System crash report references ELAN TrackPoint driver - possible CVE-2026-14256 trigger</description>
    <group>dos,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence is 0/4: no vendor patch, security advisory, or fix evidence was identified from any tracked source. The vendor fix field is N/A, and no official workarounds have been published. Until ELAN or the system integrator releases a corrected driver, organizations should operate under the assumption that the vulnerability is unfixed.

Immediate mitigations:

• Apply the principle of least privilege to all local accounts. Since the vulnerability requires a low-privilege local user (PR:L), reducing the number of local accounts and enforcing strong authentication lowers the exposure surface.
• On endpoints that do not physically ship with ELAN TrackPoint hardware, disable the ELAN TrackPoint device and driver through Device Manager or via Group Policy to remove the attack surface entirely.
• Enable Memory Integrity (HVCI) and Driver Signature Enforcement where feasible; these platform protections can block the loading of unsigned or untrusted kernel drivers, though they do not remediate a signed, vulnerable driver.
• Configure Windows Crash Dump collection (kernel and small memory dumps) and route WER/Event ID 1001 telemetry to the SIEM so any bug check referencing ELAN components is captured for forensics.
• Monitor for repeated bug checks (Event IDs 1001/6008) on any host, as a crash loop is the observable symptom of attempted exploitation.

Patch / upgrade steps:

• Track ELAN's official driver release channels and the system vendor's (OEM) driver update pages for a fixed TrackPoint driver build. No fixed version exists at the time of writing, so any driver update announced as a security fix for this CVE should be validated against the advisory before deployment.
• When a patched driver is released, deploy it through the enterprise patching pipeline after pilot testing, and document the pre-patch and post-patch driver versions.

Long-term hardening:

• Maintain a kernel driver allow-list and audit all driver installations (Event ID 7045) with change-management approval.
• Add CVE-2026-14256 to your vulnerability watchlist and subscribe to NVD/CISA KEV updates, as the patch status may change without notice.
• Treat the CWE-125/out-of-bounds-write discrepancy in the CVE record as a data-quality issue: re-evaluate technical details once a vendor advisory or patch becomes available.
• For high-integrity environments, consider disabling the ELAN TrackPoint input device on shared kiosk/VDI infrastructure where pointer input can be provided by standard HID devices.

References

• NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-14256
• CVE.org Record: https://www.cve.org/CVERecord?id=CVE-2026-14256
• FIRST EPSS (score 0.00088): https://www.first.org/epss/
• CISA KEV Catalog (no entry for this CVE at the time of writing): https://www.cisa.gov/known-exploited-vulnerabilities-catalog

No vendor advisory, researcher blog, PoC, or exploit-in-the-wild evidence is currently available for CVE-2026-14256. No known threat-actor campaigns are associated with this CVE.