CVE-2026-17120: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-17120 is an out-of-bounds write vulnerability (CWE-787) affecting IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. This flaw could allow a remote attacker to cause a denial of service by triggering a buffer overflow condition. The vulnerability does not impact confidentiality or integrity but can disrupt availability. The CVSS v3.1 base score is 5.3, indicating medium severity. No known exploits are reported in the wild, and no official patch or remediation details are provided in the available data.
CVSS v3.1
Score 5.3medium
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
The vulnerability identified as CVE-2026-17120 involves an out-of-bounds write in IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. This buffer overflow can be triggered remotely without authentication, leading to denial of service conditions. The CVSS 3.1 vector indicates the attack vector is network-based with low attack complexity and no privileges or user interaction required. The impact is limited to availability disruption, with no confidentiality or integrity loss reported. No vendor advisory or patch information is currently available.
Potential Impact
A remote attacker can exploit this vulnerability to cause a denial of service on affected IBM AIX and PowerVM VIOS systems. There is no indication of data confidentiality or integrity compromise. The disruption could affect system availability but does not allow code execution or data leakage based on the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor IBM's security advisories for updates. No specific mitigations are provided in the current data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T16:19:34.618Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877787acd9273b492c5e38
Added to database: 08/20/2026, 21:54:15 UTC
Last enriched: 09/11/2026, 03:49:01 UTC
Last updated: 10/04/2026, 18:53:14 UTC
Views: 33
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