Linux Linux Kernel
CVE-2026-64056
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.
What this means for your business
- It affects Linux Kernel. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.6% chance of attack attempts being seen in the next 30 days, ranking above 44% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Linux Kernel, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
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Scoring
- CVSS
- 9.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Assigned by
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dates
- Published
- 2026-07-19
- Last modified
- 2026-09-02
- Sources
- NVD
Affected products
- Linux Linux Kernel4.16 - 5.10.258, 5.11 - 5.15.209, 5.16 - 6.1.175, 6.2 - 6.6.142, 6.7 - 6.12.92, 6.13 - 6.18.34, 6.19 - 7.0.11, 7.1
As listed in the NVD configuration data. Not a statement about your estate.
References
- https://git.kernel.org/stable/c/06937db21ee311ed07eba47954447245041a982d
- https://git.kernel.org/stable/c/27856d533eca3804008695f61c1e4d5ff984196b
- https://git.kernel.org/stable/c/3b249988d774dacf13b203817e971934a42243c4
- https://git.kernel.org/stable/c/67a35e7da7ef9d2f000aa758552a128324c604a0
- https://git.kernel.org/stable/c/6bba24e9ebe6f1c0b356cd471e36bdc7fa434897
- https://git.kernel.org/stable/c/72158ea185b27afae163949b0e86164cb6b64e55
- https://git.kernel.org/stable/c/b6b22824b30e48ce1df3a2e80990f4b8505deb50
- https://git.kernel.org/stable/c/cfd62907f3cdbc3b6da8f49ba907c0390018fe5e