CVE-2026-76105

Executive Summary

CVE-2026-76105 is a Use of Insufficiently Random Values (CWE-330) vulnerability affecting Dell Container Storage Modules (CSM) versions prior to 1.18.0. An unauthenticated attacker with local access can exploit weak or predictable randomness to tamper with information processed by the affected components, resulting in high integrity and availability impact. The vulnerability carries a CVSS 3.1 score of 7.7, and no public proof-of-concept, exploit code, or Nuclei template exists at the time of writing.

Technical Analysis

The root cause of CVE-2026-76105 is CWE-330: Use of Insufficiently Random Values. Dell Container Storage Modules is a suite of tools that extend Kubernetes Container Storage Interface (CSI) drivers for Dell storage platforms, providing features such as authorization, replication, observability, and resilient storage operations across a container orchestration environment.

When software relies on insufficiently random values for security-relevant operations — such as generating tokens, session identifiers, cryptographic nonces, secrets, or keys — the resulting values become statistically predictable. An attacker who can observe a sample of generated values or who understands the weak entropy source can predict future values or brute-force existing ones. This predictability undermines any security control built on top of that randomness, enabling the attacker to forge, guess, or replay security-relevant values.

The NVD description explicitly states that an unauthenticated attacker with local access could exploit this vulnerability. This indicates the attack surface requires the adversary to have some degree of local presence on the host or within the environment where the affected CSM component runs. Because the CVSS vector lists PR:N (no privileges required) and UI:N (no user interaction), the flaw can be triggered without valid credentials and without tricking a legitimate user into an action. The scope is unchanged (S:U), meaning the impact is confined to the vulnerable CSM component and its resources.

The confidentiality impact is None (C:N), while integrity is High (I:H) and availability is High (A:H). This profile is consistent with a scenario where the attacker manipulates values that CSM relies upon — tampering with configuration, state, identifiers, or stored data — rather than directly exfiltrating sensitive information. Tampering with these values could corrupt storage operations managed by CSM, disrupt or manipulate CSI-driven workflows, and cause denial-of-service conditions affecting the availability of storage resources that the module manages.

No function names, class names, endpoints, parameters, or file paths are disclosed in the available CVE data. Accordingly, this analysis deliberately does not speculate about specific code locations. The vulnerability is characterized here strictly at the class and mechanism level per the authoritative description.

Exploitation Scenarios

No public PoC or exploit code is available; the attack chain below is inferred from the vulnerability class (CWE-330) and the CVSS vector, not from a published exploit.

1. Reconnaissance / target identification. The attacker identifies systems running the Dell Container Storage Modules suite at a version earlier than 1.18.0. Because the required access vector is Local (AV:L) with no privileges (PR:N), the attacker focuses on hosts or containers where CSM components are deployed, such as Kubernetes nodes running the affected CSI-related modules.

2. Triggering the flaw class. The attacker interacts with the affected CSM component through local access and observes or collects security-relevant values that the module generates using the insufficiently random source. Because the generator produces predictable values, the attacker can model the generation process and determine what values the component will produce next or reconstruct how a previously generated value was derived.

3. Payload / execution at the vulnerability-class level. With knowledge of the predictable value generation, the attacker forges, guesses, or substitutes a security-relevant value that the CSM component expects or produces. This is a value-prediction class attack rather than memory corruption or code injection; the attacker manipulates data the module processes. No specific payload format, token name, or interface can be stated because the CVE data provides no such details.

4. Post-exploitation impact. Successful manipulation violates the integrity of the affected component's data (I:H), tampering with information that CSM manages, and can disrupt storage-related operations to a degree that causes availability loss (A:H). Since C:N is None, the primary outcome is tampering and disruption rather than direct information disclosure. The unchanged scope (S:U) indicates the impact is contained to the CSM component and its managed resources rather than pivoting directly across a security boundary.

Impact Assessment

The immediate impact is information tampering (High integrity) accompanied by High availability impact, meaning affected CSM deployments can be manipulated or made unavailable, with broad damage to the storage workflows they manage. The absolute score of 7.7 reflects a serious vulnerability, tempered by the Local attack vector (AV:L) requiring the attacker to already have some presence in the environment.

Affected systems are those running Dell Container Storage Modules prior to version 1.18.0. Blast radius is concentrated in containerized or Kubernetes-based storage environments that use CSM. Because CSM bridges Kubernetes storage orchestration with Dell storage platforms, integrity and availability failures can propagate to any workload depending on storage provisioned or managed through the affected module — potentially causing data corruption, failed volume operations, and outages. There is no evidence of exploit-in-the-wild, CISA KEV listing, or public PoC; the operational risk is primarily elevated for environments where untrusted local users, tenants, or adjacent workloads can reach the CSM component.

Detection Guidance

The rules below target behavior associated with predictable-randomness abuse and unauthorized tampering by local actors. Because no specific endpoints or parameters are publicly documented, these detections are heuristic and should be tuned to the behavior observed in the affected environment.

Sigma Rule

title: Potential Insufficient Randomness Abuse in Dell CSM (CVE-2026-76105)
id: 5b1e2c4a-9f30-4d17-8a2e-76105csm001
status: experimental
description: Detects anomalous local process activity and repeated interaction with Dell Container Storage Modules that may indicate exploitation of CWE-330 predictable value generation.
author: Threat Intelligence Team
logsource:
  category: process_creation
  product: linux
detection:
  selection_csm:
    Image|contains:
      - 'csm-'
      - 'dell-csm'
  selection_behavior:
    CommandLine|contains:
      - 'token'
      - 'secret'
      - 'nonce'
      - 'key'
  condition: selection_csm and selection_behavior
falsepositives:
  - Legitimate administrative tooling and CSI driver management scripts
level: medium
tags:
  - attack.t1552
  - cve.2026-76105

YARA Rule

rule CVE_2026_76105_CSM_Insufficient_Randomness
{
    meta:
        description = "Detects strings associated with weak randomness handling and Dell CSM components referenced in CVE-2026-76105"
        author = "Threat Intelligence Team"
        date = "2026-01-01"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-76105"
        cve = "CVE-2026-76105"

    strings:
        $csm1 = "Container Storage Modules" ascii wide nocase
        $csm2 = "dell-csm" ascii wide nocase
        $rand1 = "math/rand" ascii
        $rand2 = "rand.Intn" ascii
        $rand3 = "seed" ascii nocase

    condition:
        uint16(0) == 0x5A4D or (($csm1 or $csm2) and any of ($rand*))
}

Suricata IDS Rule

alert tcp any any -> any any (msg:"CVE-2026-76105 Potential Dell CSM Predictable Value Tampering Activity"; flow:to_server,established; content:"csm"; nocase; content:"token"; nocase; distance:0; content:"nonce"; nocase; distance:0; threshold:type both, track by_src, count 5, seconds 60; classtype:attempted-admin; sid:7610501; rev:1; reference:cve,2026-76105;)

Elastic Detection

sequence by host.id with maxspan=2m
  [ process where event.type == "start" and process.name : "csm-*" ]
  [ process where event.type == "start" and process.args : ("*token*", "*secret*", "*nonce*", "*key*") ]

Splunk SPL Query

index=linux sourcetype=auditd OR sourcetype=sysmon_linux
| search (process_path="*csm*" OR process="*dell-csm*")
| search (command_line="*token*" OR command_line="*secret*" OR command_line="*nonce*" OR command_line="*key*")
| stats count min(_time) as first_seen max(_time) as last_seen by host, user, process, command_line
| where count > 3
| sort - count

Wazuh OSSEC Rule

<group name="dell_csm,cve_2026_76105">
  <rule id="761050" level="10">
    <decoded_as>json</decoded_as>
    <field name="process">\.*(csm|dell-csm)\.*</field>
    <field name="commandLine">\.*(token|secret|nonce|key)\.*</field>
    <description>CVE-2026-76105: Potential Dell CSM insufficient randomness tampering activity detected</description>
    <mitre>
      <id>T1552</id>
    </mitre>
    <group>cve_2026_76105,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source).

1. Immediate mitigations. Because the vulnerability requires local access with no privileges, restrict local access to hosts and containers running Dell Container Storage Modules prior to 1.18.0. Apply least-privilege and process isolation so that untrusted local users, tenants, or adjacent workloads cannot interact with CSM components. Monitor the detections above for anomalous value or token handling. There is no documented vendor workaround.

2. Patch / upgrade steps. Upgrade Dell Container Storage Modules to version 1.18.0 or later, which is the version boundary identified by the CVE. Validate the running version across all nodes and namespaces and confirm the upgrade in a staging environment before production rollout. No official vendor fix artifacts or advisories are tracked in the available data, so verify the version requirement against Dell's official documentation.

3. Long-term hardening. Adopt secure randomness practices across the environment: require cryptographically secure random number generation for any security-relevant values (tokens, secrets, nonces, keys). Maintain an inventory of container storage components and track CVE exposure against them. Enforce network and host segmentation to limit local attack surface, integrate CVE-2026-76105 into vulnerability management prioritization given its 7.7 severity, and monitor Dell advisories for a formal patch or workaround to replace these interim measures.

References

1. NVD — CVE-2026-76105: https://nvd.nist.gov/vuln/detail/CVE-2026-76105
2. CWE-330 — Use of Insufficiently Random Values: https://cwe.mitre.org/data/definitions/330.html
3. Dell Container Storage Modules product documentation (official Dell support portal) — verify fixed version 1.18.0 and any future advisory.
4. FIRST EPSS — not yet scored for CVE-2026-76105 (https://www.first.org/epss).
5. CISA Known Exploited Vulnerabilities Catalog — CVE-2026-76105 is NOT listed (verified NO).

No public exploit code, PoC, or Nuclei template is available. No threat actor campaigns or exploit-in-the-wild evidence have been identified for this CVE.