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Vulnerability record · CVE-2026-64056 · published 19 July 2026

CVE-2026-64056: Linux kernel vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.55% · top 56.1%
9.8CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
2 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/06937db21ee311ed07eba47954447245041a982d Patch
https://git.kernel.org/stable/c/27856d533eca3804008695f61c1e4d5ff984196b Patch
https://git.kernel.org/stable/c/3b249988d774dacf13b203817e971934a42243c4 Patch
https://git.kernel.org/stable/c/67a35e7da7ef9d2f000aa758552a128324c604a0 Patch
https://git.kernel.org/stable/c/6bba24e9ebe6f1c0b356cd471e36bdc7fa434897 Patch
https://git.kernel.org/stable/c/72158ea185b27afae163949b0e86164cb6b64e55 Patch
https://git.kernel.org/stable/c/b6b22824b30e48ce1df3a2e80990f4b8505deb50 Patch
https://git.kernel.org/stable/c/cfd62907f3cdbc3b6da8f49ba907c0390018fe5e Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64056), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.