CVE-2026-18822: CWE-400 Uncontrolled Resource Consumption in IBM AIX
Description
CVE-2026-18822 is a medium severity vulnerability in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It involves uncontrolled resource consumption during the parsing of directory records by a local attacker, potentially causing a denial of service. The vulnerability requires high privileges and does not impact confidentiality or integrity. No known exploits are reported in the wild. Patch status is not confirmed from the provided data.
CVSS v3.1
Score 4.4medium
Affected software
IBM
AIX
IBM
PowerVM VIOS
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-18822) affects IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. It is classified as CWE-400 (Uncontrolled Resource Consumption). A local attacker with high privileges can trigger excessive resource consumption when the system parses directory records, leading to denial of service conditions. The CVSS v3.1 score is 4.4, reflecting a medium severity with no impact on confidentiality or integrity, only availability.
Potential Impact
A local attacker with high privileges can cause a denial of service by exhausting system resources during directory record parsing. There is no impact on confidentiality or integrity. This could disrupt system availability until resources are restored or the system is rebooted.
Mitigation Recommendations
Patch status is not confirmed from the provided data. No vendor advisory or patch links are available. It is recommended to monitor IBM's official advisories for updates and apply any official fixes once released. Until then, restrict local access to trusted users and consider limiting the parsing of untrusted directory records if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-04T13:27:33.763Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877ac7acd9273b493025ef
Added to database: 08/20/2026, 22:08:07 UTC
Last enriched: 09/11/2026, 03:47:59 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 51
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