CVE-2026-23122
Unknown Unknown - Not Provided
TX Buffer Overflow Risk in Linux igc Driver Causing Hangs

Publication date: 2026-02-14

Last updated on: 2026-03-18

Assigner: kernel.org

Description
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.
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Meta Information
Published
2026-02-14
Last Modified
2026-03-18
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23122
EUVD
EUVD-2026-5914
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.16 (inc) to 6.18.8 (exc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability relates to the Linux kernel's handling of the igc network driver, specifically concerning the TSN (Time-Sensitive Networking) TX packet buffer size per queue.

Previously, the TX packet buffer was set to 7 KB per queue, which caused the TX unit to hang under heavy timestamping load. The vulnerability was that this buffer size could lead to hangs during heavy TSN traffic.

The fix involved reducing the TX packet buffer size from 7 KB to 5 KB per queue, which prevents these hangs and aligns with the TSN recommendation in the I225/I226 software user manual.

Impact Analysis

The impact of this vulnerability is that under heavy timestamping load, the TX unit in the network driver could hang, potentially causing network transmission issues or interruptions.

By causing hangs, this could lead to degraded network performance or temporary loss of network connectivity in systems using the affected driver and hardware.

However, the fix reduces the buffer size to prevent these hangs without impacting throughput, so normal network performance should be maintained after the fix.

Compliance Impact

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