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IBM AIX CVE-2026-17165

| EUVDEUVD-2026-63724 HIGH
NULL Pointer Dereference (CWE-476)
2026-08-20 psirt@us.ibm.com GHSA-4m3m-j46g-wppc
7.5
CVSS 3.1 · Vendor: us
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Severity by source

Vendor (us) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Network-reachable, unauthenticated trigger with no complexity barrier; impact is strictly availability loss via crash with no code execution, confidentiality, or integrity consequence.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (us).

CVSS VectorVendor: us

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 20, 2026 - 22:53 vuln.today
CVE Published
Aug 20, 2026 - 22:17 nvd
HIGH 7.5

DescriptionCVE.org

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to a NULL pointer dereference.

AnalysisAI

Remote denial of service in IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 is achievable by an unauthenticated attacker via a NULL pointer dereference (CWE-476) in a network-accessible component, yielding full availability loss against affected systems. The vulnerability carries a CVSS 7.5 High score with no confidentiality or integrity exposure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation No authentication or user interaction is required per the CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U) - remote unauthenticated exploitation is possible against a network-accessible service on IBM AIX 7.2/7.3 or PowerVM VIOS 4.1. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.5 High score is driven entirely by full availability impact (A:H) against a network-accessible, unauthenticated, low-complexity attack path - this is a crash-on-demand scenario if the vulnerable service is reachable. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult the IBM support advisory at https://www.ibm.com/support/pages/node/7283858 for authoritative fix levels, interim fixes (IFixes), and applicable Technology Level and Service Pack combinations. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems, assess their business criticality, and document network exposure. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-17165 vulnerability details – vuln.today

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