CVE-2026-23122: igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue
In the Linux kernel, the following vulnerability has been resolved:
igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue
The previous 7 KB per queue caused TX unit hangs under heavy timestamping load. Reducing to 5 KB avoids these hangs and matches the TSN recommendation in I225/I226 SW User Manual Section 7.5.4.
The 8 KB "freed" by this change is currently unused. This reduction is not expected to impact throughput, as the i226 is PCIe-limited for small TSN packets rather than TX-buffer-limited.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.18.8-1 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.8 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.15-1 - Configuration
Reduce the TSN TX packet buffer from 7KB to 5KB per queue.
Linux kernel igc driver TSN TX packet buffer per queue = 5KB
Event History
Frequently Asked Questions
What is the severity of CVE-2026-23122?
The severity of CVE-2026-23122 is medium, with a CVSS score of 5.5.
How do I fix CVE-2026-23122?
CVE-2026-23122 can be fixed by applying the available patch.
What impact does CVE-2026-23122 have on system performance?
CVE-2026-23122 may lead to TX unit hangs under heavy timestamping load due to buffer sizing.
Which versions of the Linux kernel are affected by CVE-2026-23122?
CVE-2026-23122 affects the Linux kernel implementing the TSN TX packet buffer configuration.
What is the recommended packet buffer size in CVE-2026-23122?
The recommended TX packet buffer size for CVE-2026-23122 is 5 KB per queue.