In the Linux kernel the field masks used by the Integrated Packet Adapter (IPA) subsystem were incorrect for IPA version 5.0 and newer. The mismatch caused the kernel to interpret hardware register values incorrectly and produced a warning when the remote processor service attempted to stop IPA. The bug does not expose data or allow arbitrary code execution; it only results in a stability warning and potential unintended state changes in the IPA subsystem.

The affected product is the Linux kernel, as indicated by the CPE string. No specific kernel release numbers are listed in the data, so all kernel builds that include the IPA v5.0+ code path are potentially impacted until the fix is applied.

This issue is not listed in the CISA Known Exploited Vulnerabilities catalog and the EPSS score is < 1%, indicating a low probability of exploitation. The CVSS score of 5.5 denotes a medium severity. Because the vulnerability is a correctness bug rather than a security flaw, it is unlikely to be actively exploited and the risk is low. There is no documented attack vector; the only observable effect is the kernel warning and any associated instability.