CVE-2026-31738 : faille moyenne linux linux kernel (CVSS 5.5)

In the Linux kernel, the following vulnerability has been resolved: vxlan: validate ND option lengths in vxlan_na_create vxlan_na_create() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.

Sévérité

Moyenne (CVSS 5.5)

Vecteur CVSS

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

Exploitation active

Non signalée par la CISA

Publication

1 mai 2026

Dernière mise à jour

17 juin 2026

• linux linux kernel

• Fiche CVE-2026-31738 sur le NVD (NIST)
• git.kernel.org/stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c…
• git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229…
• git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b…
• git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9…
• git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d7…
• git.kernel.org/stable/c/de20d2e3b9179d132f5f5b44e490d7c916c63…
• git.kernel.org/stable/c/e476745917a1e288eb15e7ff49d286a86a486…
• git.kernel.org/stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd…