CVE-2026-23122

A flaw was found in the Linux kernel's igc (Intel I225/I226) Ethernet driver. The TX packet buffer configuration of 7KB per queue for Time-Sensitive Networking (TSN) mode can cause TX unit hangs under heavy timestamping workloads. This occurs because the buffer size exceeds the hardware's recommended configuration, leading to network interface unavailability.

This issue specifically affects Intel I225/I226 Ethernet controllers when using TSN features with hardware timestamping under heavy load. The fix aligns the buffer configuration with Intel's software user manual recommendations. Systems not using TSN or heavy timestamping workloads are unlikely to be affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent the igc module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist kernel modules.