Quick answers
- Is CVE-2026-17423 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-17423 being exploited in the wild.
- How severe is CVE-2026-17423?
- High severity, with a CVSS score of 7.7, published 20 August 2026.
- Which products and versions are affected?
- IBM Aix 7.2, 7.3; IBM PowerVM VIOS 4.1.
- Is there a fix for CVE-2026-17423?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-17423 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-17423?
- Check whether you run IBM Aix or IBM PowerVM VIOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an out-of-bounds read in IBM AIX 7.2, 7.3 and IBM PowerVM VIOS 4.1. The root cause and vulnerable component details are not fully disclosed in available summaries. The attack vector is network-based, allowing remote attackers without authentication to exploit the flaw. Successful exploitation enables information disclosure (reading sensitive data from memory) and denial of service. IBM has released security updates through Service Packs (SPs) and Fix Packs (FPs) to remediate this issue, and customers are advised to apply patches promptly.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed: CVE-2026-17423 published on NVD
- 2026-08-21: advisory: IBM Security Bulletin updated with remediation guidance