Quick answers
- Is CVE-2026-19446 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19446 being exploited in the wild.
- How severe is CVE-2026-19446?
- High severity, with a CVSS score of 7.5, 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-2026-19446?
- 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-2026-19446 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-19446?
- 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
This vulnerability is a remote denial-of-service (DoS) condition in the RPC service component of IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1. An unauthenticated attacker can craft a malformed UDP packet targeting a reachable RPC endpoint, triggering a crash or hang that renders the system completely unavailable and requires an LPAR (logical partition) restart to recover. The attack vector is network-based with no authentication required, making it broadly exploitable if RPC services are exposed. Patches are available through IBM service packs and fix packs.
Affected products
- IBM AIX 7.2, 7.3
- IBM PowerVM VIOS 4.1
Timeline
- 2026-08-20: disclosed