CVE-2026-18102
LowCVSS 3.5Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to overwrite adjacent memory due to an integer underflow during bounds checking.
Risk Assessment
Memory overwrite could lead to system crash, arbitrary code execution, or privilege escalation, posing a serious threat to system integrity.
Recommendation
Apply the patches provided by IBM for the affected versions of IBM i. Restrict system access to trusted users only.
Other vulnerabilities in IBM i
See all- CVE-2026-17083Critical
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to execute arbitrary code due to a stack-based buffer overflow.
- CVE-2026-17276Critical
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to escalate privileges due to improper authorization in the handling of high-authority threads.
- CVE-2026-17218Critical
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to execute arbitrary code due to an out-of-bounds write.
- CVE-2026-16860Critical
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to execute arbitrary code due to an uncontrolled search path element.
- CVE-2026-84414High
IBM i versions 7.6, 7.5, 7.4, and 7.3 contain a vulnerability that allows a local authenticated attacker to change the ownership of arbitrary files due to improper validation of an attacker-controlled file path.
- CVE-2026-18869Medium
IBM i versions 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions and access internal network services due to improper validation of FTP PORT and EPRT commands.
- CVE-2026-17262Medium
IBM i versions 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to improper validation of FTP authentication commands.
- CVE-2026-19280Medium
IBM i versions 7.6, 7.5, 7.4, and 7.3 could allow a denial of service as a result of a buffer overflow in a PASE process. An authenticated attacker could leverage this to terminate their own process.
- CVE-2026-19086Low
IBM i versions 7.6, 7.5, 7.4, and 7.3 contain a buffer overflow in a PASE process that can lead to denial of service. An authenticated attacker could leverage this to terminate their own process.
- CVE-2026-18069Medium
IBM i versions 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to obtain ownership of arbitrary file system objects due to a time-of-check to time-of-use (TOCTOU) race condition.
Original NVD description (English source)
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to overwrite adjacent memory due to an integer underflow during bounds checking.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

