CVE-2026-16896: IBM i is Affected By Multiple Vulnerabilities in Network Authentication Service
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to obtain unauthorized access to files due to a time-of-check time-of-use (TOCTOU) race condition.
Other sources
IBM i could allow a local authenticated attacker to obtain unauthorized access to files due to a time-of-check time-of-use (TOCTOU) race condition.
— IBM
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
IBM i 7.6to a version that resolves this vulnerability.Fixed in 7.6Patch SJ11094 - Upgrade
Upgrade
IBM i 7.5to a version that resolves this vulnerability.Fixed in 7.5Patch SJ11093 - Upgrade
Upgrade
IBM i 7.4to a version that resolves this vulnerability.Fixed in 7.4Patch SJ11095 - Upgrade
Upgrade
IBM i 7.3to a version that resolves this vulnerability.Fixed in 7.3Patch SJ11096
Event History
Frequently Asked Questions
What is the severity of CVE-2026-16896?
CVE-2026-16896 has a severity score of 7.1, which is classified as high.
How do I fix CVE-2026-16896?
To mitigate CVE-2026-16896, ensure that your IBM i system is updated to the latest version that addresses this vulnerability.
What systems are affected by CVE-2026-16896?
CVE-2026-16896 affects IBM i versions 7.6, 7.5, 7.4, and 7.3.
What type of attack does CVE-2026-16896 facilitate?
CVE-2026-16896 allows a local authenticated attacker to gain unauthorized access to files through a race condition.
What is the risk level associated with CVE-2026-16896?
CVE-2026-16896 has a risk level of 52, indicating a significant security threat.