What’s Vulnerable › Vulnerabilities
CVE-2026-19783: Vulnerabilities in IBM AIX and PowerVM VIOS
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-20 · updated 2026-10-26
- Weakness: CWE-787
Description
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause kernel memory corruption due to insufficient validation. A crafted filesystem image can trigger an out-of-bounds kernel-stack write during directory reads, causing a system crash or potentially enabling privilege escalation.
Affected products
- IBM AIX: from 7.2.5 through 7.2.5.212; from 7.3.2 through 7.3.2.5; from 7.3.3 through 7.3.3.2; from 7.3.4 through 7.3.4.1
- IBM VIOS: from 4.1.0 before 4.1.0.50; from 4.1.1.0 before 4.1.1.30; from 4.1.2.0 before 4.1.2.20 — fixed in 4.1.0.50, 4.1.1.30, 4.1.2.20
How to fix
Upgrade to a fixed version: IBM VIOS 4.1.0.50, 4.1.1.30, 4.1.2.20. Check the vendor advisory for mitigations.
References
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