CVE-2026-19448: CWE-908 Use of Uninitialized Resource in IBM AIX
Description
CVE-2026-19448 is a stack memory corruption vulnerability in the IPsec ESP decapsulation handler of IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. Exploiting this flaw can corrupt kernel stack state and cause a system crash, resulting in denial of service. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource) and has a CVSS v3.1 base score of 6.5 (medium severity). No public exploits or patches are currently documented.
CVSS v3.1
Score 6.5medium
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 involves a stack memory corruption in the IPsec ESP decapsulation handler of IBM AIX versions 7.2, 7.3, and IBM PowerVM VIOS 4.1. The root cause is the use of uninitialized resources (CWE-908), which may lead to kernel stack corruption. Successful exploitation can cause a denial of service by crashing the system. The CVSS 3.1 vector indicates network attack vector with high attack complexity and no privileges or user interaction required, impacting availability but not confidentiality or integrity.
Potential Impact
Successful exploitation results in denial of service due to system crash caused by kernel stack corruption. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently provided. Monitor IBM security advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-10T13:43:32.889Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877e39acd9273b493410aa
Added to database: 08/20/2026, 22:22:49 UTC
Last enriched: 09/11/2026, 03:47:48 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 64
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