PT-2026-61373 · Linux · Linux

CVE-2026-64056 · Published 2026-07-19 · Updated 2026-07-19

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 gmac rx() 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 napi gro frags(), on error (after calling napi free frags()) 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.

Fix

Related Identifiers

CVE-2026-64056

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64056 · Security Note
• https://git.kernel.org/stable/c/6bba24e9ebe6f1c0b356cd471e36bdc7fa434897 · Note
• https://git.kernel.org/stable/c/b6b22824b30e48ce1df3a2e80990f4b8505deb50 · Note
• https://git.kernel.org/stable/c/cfd62907f3cdbc3b6da8f49ba907c0390018fe5e · Note
• https://git.kernel.org/stable/c/27856d533eca3804008695f61c1e4d5ff984196b · Note
• https://git.kernel.org/stable/c/06937db21ee311ed07eba47954447245041a982d · Note
• https://git.kernel.org/stable/c/72158ea185b27afae163949b0e86164cb6b64e55 · Note
• https://git.kernel.org/stable/c/67a35e7da7ef9d2f000aa758552a128324c604a0 · Note
• https://git.kernel.org/stable/c/3b249988d774dacf13b203817e971934a42243c4 · Note