Vulnerability record · CVE-2026-19446 · published 20 August 2026

CVE-2026-19446: Ibm vios uncontrolled resource consumption vulnerability

Ibm · Vios

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 allows a remote unauthenticated attacker can send a crafted UDP packet to a reachable RPC service, resulting in complete system unavailability and requiring an LPAR restart.

7.5 CVSS 3.1 High EPSS 1.0% · top 37.6% CWE-400 · Uncontrolled resource consumption

7.5CVSS 3.1 base score

1.0%EPSS exploitation probability, 30 days

NoNot in CISA KEV

2Affected product versions listed by NVD

1References

25 Aug 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Aix Ibm

Vios Ibm

References

Link	Tags
https://www.ibm.com/support/pages/node/7283858	PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2024-56346Ibm aix vulnerabilityIBM AIX 7.2 and 7.3 nimesis NIM master service could allow a remote attacker to execute arbitrary commands due to improper process controls.EPSS 1.1%18 Mar 2025 10.0CVE-2010-3187Ibm aix memory buffer overflow vulnerabilityBuffer overflow in ftpd in IBM AIX 5.3 and earlier allows remote attackers to execute arbitrary code via a long NLST command.EPSS 20%30 Aug 2010 10.0CVE-2010-1039Hp nfs\/oncplus vulnerabilityFormat string vulnerability in the _msgout function in rpc.pcnfsd in IBM AIX 6.1, 5.3, and earlier; IBM VIOS 2.1, 1.5, and earlier; NFS/ONCplus B.11.…EPSS 20%20 May 2010 10.0CVE-2009-3699IBM AIX and VIOS rpc.cmsd XDR string stack buffer overflowA stack-based buffer overflow exists in libcsa.a, the calendar daemon library used by rpc.cmsd, in IBM AIX 5.x through 5.3.10, 6.x through 6.1.3, and…EPSS 62%analysed15 Oct 2009 10.0CVE-2009-3517Ibm aix vulnerabilitynfs.ext in IBM AIX 5.3.x through 5.3.9 and 6.1.0 through 6.1.2 does not properly use the nfs_portmon setting, which allows remote attackers to bypass…EPSS 4.4%1 Oct 2009 10.0CVE-2006-5008Ibm aix vulnerabilityUnspecified vulnerability in utape in IBM AIX 5.2.0 and 5.3.0 allows attackers to execute arbitrary commands and overwrite arbitrary files via unspec…EPSS 3.5%27 Sep 2006 10.0CVE-2005-4272Ibm aix vulnerabilityMultiple buffer overflows in IBM AIX 5.1, 5.2, and 5.3 allow remote attackers to execute arbitrary code via (1) muxatmd and (2) slocal.EPSS 9.0%15 Dec 2005 10.0CVE-2005-1037Ibm aix vulnerabilityUnknown vulnerability in AIX 5.3.0, when configured as an NIS client, allows remote attackers to gain root privileges.EPSS 2.4%2 May 2005

Source: NIST National Vulnerability Database (record CVE-2026-19446), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.