CVE-2026-64056

net: ethernet: cortina: Make RX SKB per-port

State: Published
Severity: 9.8 Critical
Published: Jul 19, 2026
Updated: Aug 5, 2026
Reserved: Jul 19, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 27856d533eca3804008695f61c1e4d5ff984196bAffected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before b6b22824b30e48ce1df3a2e80990f4b8505deb50Affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 6bba24e9ebe6f1c0b356cd471e36bdc7fa434897Affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 3b249988d774dacf13b203817e971934a42243c4Affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 72158ea185b27afae163949b0e86164cb6b64e55Affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before cfd62907f3cdbc3b6da8f49ba907c0390018fe5eAffected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 67a35e7da7ef9d2f000aa758552a128324c604a0Affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 06937db21ee311ed07eba47954447245041a982dAffected
LinuxLinux	4.16Affected before 4.16Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.142 through 6.6.Not affected 6.12.92 through 6.12.Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 27856d533eca3804008695f61c1e4d5ff984196bAffected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before b6b22824b30e48ce1df3a2e80990f4b8505deb50Affected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 6bba24e9ebe6f1c0b356cd471e36bdc7fa434897Affected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 3b249988d774dacf13b203817e971934a42243c4Affected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 72158ea185b27afae163949b0e86164cb6b64e55Affected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before cfd62907f3cdbc3b6da8f49ba907c0390018fe5eAffected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 67a35e7da7ef9d2f000aa758552a128324c604a0Affected
4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 to before 06937db21ee311ed07eba47954447245041a982dAffected

LinuxLinux

4.16Affected
before 4.16Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.142 through 6.6.*Not affected
6.12.92 through 6.12.*Not affected
6.18.34 through 6.18.*Not affected
7.0.11 through 7.0.*Not affected
7.1 and laterNot affected

References

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