CVE-2026-64056: net: ethernet: cortina: Make RX SKB per-port
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: cortina: Make RX SKB per-port
The SKB used to assemble packets from fragments in gmacrx() is static local, but the Gemini has two ethernet ports, meaning there can be races between the ports on a bad day if a device is using both.
Make the RX SKB a per-port variable and carry it over between invocations in the port struct instead.
Zero the pointer once we call napigrofrags(), on error (after calling napifreefrags()) or if the port is stopped.
Zero it in some place where not strictly necessary just to emphasize what is going on.
This was found by Sashiko during normal patch review.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64056?
CVE-2026-64056 has a severity rating of critical with a CVSS score of 9.8.
How do I fix CVE-2026-64056?
To fix CVE-2026-64056, update the Linux kernel to the latest version where the vulnerability has been resolved.
What are the potential impacts of CVE-2026-64056?
CVE-2026-64056 can lead to race conditions between two ethernet ports, which may compromise data integrity, confidentiality, and availability.
Which software is affected by CVE-2026-64056?
CVE-2026-64056 affects the Linux kernel, specifically in the functionality of ethernet handling.
What was the publication date of CVE-2026-64056?
CVE-2026-64056 was published on July 19, 2026.