Description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to bypass security restrictions due to improper limitation of a pathname to a restricted directory.
Published: 2026-08-20
Score: 4.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A path traversal weakness allows a remote attacker to provide an arbitrary pathname to a privileged service, enabling read or write access to files outside the intended restricted directory. This can lead to unauthorized disclosure of confidential data or modification of critical system files, thereby compromising integrity and confidentiality of the affected system.

Affected Systems

IBM AIX versions 7.2 and 7.3, including AIX 7.3 TL04SP2, TL03SP3, and TL02SP5, and AIX 7.2 TL05 SP13, as well as PowerVM VIOS 4.1, specifically VIOS 4.1.0 4.1.0.50, VIOS 4.1.1 4.1.1.30, and VIOS 4.1.2 4.1.2.20. All versions listed are affected until the corresponding Service Pack or Fix Pack is applied.

Risk and Exploitability

The vulnerability has a CVSS score of 4.8, indicating moderate severity. No EPSS score is available, and the issue is not listed in the CISA KEV catalog, suggesting limited public exploitation data. The likely attack vector is remote, leveraging the ability to input a crafted path into vulnerable IBM AIX or PowerVM VIOS services. Because the flaw involves improper pathname validation, an attacker does not need elevated privileges to exploit it, making it potentially accessible to a broad threat set.

Generated by OpenCVE AI on August 21, 2026 at 00:16 UTC.

Remediation

Vendor Solution

A.  APARS IBM has assigned the following APARs to this problem: AIX LevelAPARAvailability  SPKEY7.2.5IJ5956608/14/2026SP13key_w_apar7.3.2IJ5956508/14/2026SP05key_w_apar7.3.3IJ5956408/14/2026SP03key_w_apar7.3.4IJ59563 08/14/2026SP02key_w_apar VIOS LevelAPARAvailability SPKEY4.1.0IJ5956508/14/20264.1.0.50key_w_apar4.1.1IJ5956408/14/20264.1.1.30key_w_apar4.1.2IJ5956308/14/20264.1.2.20key_w_apar B.  FIXES IBM strongly recommends addressing the vulnerability now.  AIX and VIOS fixes are available and can be downloaded from Fix Central: https://www.ibm.com/support/fixcentral  An LPAR reboot is required to complete the SP/FP update. On AIX, Live Update can be used to avoid a reboot.  IBM has assigned the following AIX Service Packs (SPs) and VIOS Fix Packs (FPs) as the remediation levels for the published vulnerabilities. AIX Level Service PackAIX 7.3 TL04SP2AIX 7.3 TL03SP3AIX 7.3 TL02SP5AIX 7.2 TL05 SP13 PowerVM VIOS LevelFix PackVIOS 4.1.2 4.1.2.20VIOS 4.1.1 4.1.1.30VIOS 4.1.0  4.1.0.50 Note: These SPs/FPs are cumulative and include fixes for all previously published AIX/VIOS security vulnerabilities. They can be applied on top of any earlier affected level of the TL . Note: To apply these patches using nimsh secure, special steps must be taken as the protocol between master and client is updated to be more secure. Please read this article: https://www.ibm.com/support/pages/node/7283157 Note: For VIOS 4.1.0 and VIOS 4.1.1, additional steps are required to migrate to the latest Postgres15 after applying the 4.1.1.30 or 4.1.0.50 FPs above. Instructions to do that can be found here:                             4.1.0.50 post-update instructions: https://www.ibm.com/support/pages/node/7283819           4.1.1.30 post-update instructions: https://www.ibm.com/support/pages/node/7283823


OpenCVE Recommended Actions

  • Download and install the latest AIX Service Pack (AIX 7.3 TL04SP2 or later, or AIX 7.2 TL05 SP13) or the appropriate VIOS Fix Pack (4.1.2 4.1.2.20, 4.1.1 4.1.1.30, or 4.1.0 4.1.0.50).
  • Apply the update on the target LPAR; on AIX use Live Update to avoid reboot, otherwise perform an LPAR reboot to complete the SP/FP update.
  • For VIOS 4.1.0 or 4.1.1, follow IBM’s post‑update instructions to migrate to Postgres15, as described in the provided links.

Generated by OpenCVE AI on August 21, 2026 at 00:16 UTC.

Tracking

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Advisories

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History

Thu, 20 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Description IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to bypass security restrictions due to improper limitation of a pathname to a restricted directory.
Title Vulnerabilities in IBM AIX and PowerVM VIOS
First Time appeared Ibm
Ibm aix
Ibm powervm Vios
Weaknesses CWE-22
CPEs cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm aix
Ibm powervm Vios
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-08-20T21:59:00.629Z

Reserved: 2026-07-25T06:06:13.590Z

Link: CVE-2026-17424

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-20T22:17:15.940

Modified: 2026-08-20T22:17:15.940

Link: CVE-2026-17424

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T00:30:07Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')