Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to an out-of-bounds read.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-13T20:17:15.320Z",
  "pubdate": "2026-08-13T20:17:15.320Z",
  "executiveSummary": "An out-of-bounds read vulnerability has been identified in IBM i versions 7.6, 7.5, 7.4, and 7.3.\nThis security flaw allows a remote attacker to potentially obtain sensitive information by exploiting improper bounds checking within the affected software.\nThe primary impact of successful exploitation is unauthorized information disclosure, which may expose critical system data or internal memory contents to malicious actors.\nThe vulnerability affects multiple releases of the IBM i operating system, presenting significant risk implications for enterprise environments relying on these platforms for core business operations.\nExploitation requires network connectivity to the target system, enabling remote adversaries to interact with vulnerable components without necessarily requiring advanced privileges or user interaction, depending on the specific network exposure of the affected service.\nDefenders must monitor vendor channels for official updates and apply recommended patches or configuration hardening to mitigate the risk of unauthorized data exposure.",
  "technicalDetails": "The vulnerability stems from an out-of-bounds read flaw within the memory management or input processing logic of IBM i 7.6, 7.5, 7.4, and 7.3.\nAn out-of-bounds read occurs when a software component reads data from a memory location outside of the intended buffer or allocated boundary, typically due to insufficient validation of input indices or length parameters.\nIn this scenario, a remote attacker can interact with the vulnerable network-exposed service by supplying specially crafted inputs or requests designed to trigger the out-of-bounds memory read condition.\nUpon receiving the malformed input, the vulnerable component fails to properly validate the data size or memory offset, resulting in the retrieval of adjacent memory contents.\nThe payload behavior involves the extraction or leakage of sensitive information residing in adjacent memory segments, which may include internal system states, configuration data, or remnants of previous operational transactions.\nSubsequent post-exploitation impact is primarily centered around information disclosure, where the leaked data can be analyzed by the attacker to gain deeper insights into the target architecture, potentially facilitating further sophisticated attacks against the IBM i environment.\nThe attack vector is network-based, allowing remote exploitation against vulnerable services running on the targeted IBM i versions without requiring prior authentication or localized user execution."
}