Bug 2439857 (CVE-2026-23122) - CVE-2026-23122 kernel: igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue
Summary: CVE-2026-23122 kernel: igc: Reduce TSN TX packet buffer from 7KB to 5KB per q...
Keywords:
Status: NEW
Alias: CVE-2026-23122
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-14 16:02 UTC by OSIDB Bzimport
Modified: 2026-02-16 10:10 UTC (History)
0 users

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Description OSIDB Bzimport 2026-02-14 16:02:00 UTC 
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.
Comment 1 Alexander B 2026-02-16 10:07:11 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021408-CVE-2026-23122-77b9@gregkh/T
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