CVE-2026-19442

Kernel compromise via untrusted pointer dereference

Published Aug 20, 2026 · Updated Aug 20, 2026

Untrusted pointer dereference in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to compromise the client LPAR kernel. The AIX Virtual SCSI initiator driver fails to validate a pointer before dereferencing it; IBM has not disclosed the affected function or pointer source. Exploitation requires high local privileges and can elevate privilege, crash the partition, or provide full kernel control.

CVSS severity8.2
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted pointer dereference in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 allows local users to compromise the client LPAR kernel. The AIX Virtual SCSI initiator driver fails to validate a pointer before dereferencing it; IBM has not disclosed the affected function or pointer source. Exploitation requires high local privileges and can elevate privilege, crash the partition, or provide full kernel control.

The record

CVE
CVE-2026-19442
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
IBM
Product
AIX
Classifications
CWE-822, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.2
  2. Affected versionversion=7.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

IBM · AIXversion=7.2; version=7.3
IBM · PowerVM Virtual I/O Serverversion=4.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.2IBM CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-822Untrusted Pointer Dereference
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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