Vulnerabilities in IBM AIX and PowerVM VIOS

published 2026-08-20 2 mo ago modified 2026-10-26 14 d ago also EUVD-2026-63725

cvss: 8.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to execute arbitrary code due to a stack-based buffer overflow.

Patch / fix

fixed in 1 links 1

ibm vios 4.1.0.50, 4.1.1.30, 4.1.2.20

ibm.com/support/pages/node/7283858 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 mo ago (2026-08-24)

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

IBM AIX
IBM PowerVM VIOS

Classification

Weakness

CWE-787 Out-of-bounds Write

References

ibm.com /support/pages/node/7283858
vendor-advisory, patch

Sources

CVE List CVE-2026-17168
NVD CVE-2026-17168

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary