CVE-2026-16838 HIGH

CVE-2026-16838: Vulnerabilities in IBM AIX and PowerVM VIOS

Vendor Ibm

Product AIX

Weakness CWE-367

Published August 19, 2026

Last update August 22, 2026

View on NVD All CVEs

CVSS base score

7.0/10

Attack vector Local

Attack complexity High

Privileges required Low

User interaction None

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to overwrite critical files and obtain sensitive information due to a time-of-check to time-of-use (TOCTOU) race condition.

Key dates

02Disclosure timeline

August 19, 2026 CVE published

August 22, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-16838 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/367.html AskarLabs — CWE-367 write-up Time-of-check Time-of-use (TOCTOU) Race Condition

Related vulnerabilities

Identifiers

CVE CVE-2026-16838

CWE CWE-367

CVSS 7.0 / HIGH

Affected versions

Vendor Ibm

Product AIX

Affected 7.2

Vendor Ibm

Product AIX

Affected 7.3

Vendor Ibm

Product PowerVM VIOS

Affected 4.1

CVE-2026-16838: Vulnerabilities in IBM AIX and PowerVM VIOS

01Description

02Disclosure timeline

03References

04Related CVE