CVE-2026-45952

Description

In the Linux kernel, the following vulnerability has been resolved: eth: fbnic: Add validation for MTU changes Increasing the MTU beyond the HDS threshold causes the hardware to fragment packets across multiple buffers. If a single-buffer XDP program is attached, the driver will drop all multi-frag frames. While we can't prevent a remote sender from sending non-TCP packets larger than the MTU, this will prevent users from inadvertently breaking new TCP streams. Traditionally, drivers supported XDP with MTU less than 4Kb (packet per page). Fbnic currently prevents attaching XDP when MTU is too high. But it does not prevent increasing MTU after XDP is attached.

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Références

• https://git.kernel.org/stable/c/03399063aa0c67fd8bdfd69467ddb849bb3b97df Patch
• https://git.kernel.org/stable/c/ccd8e87748ad083047d6c8544c5809b7f96cc8df Patch
• https://git.kernel.org/stable/c/d7eaa006c0444a5d4671be7efe6dbb33ef8b515e Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories