CVE-2026-43040

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak When processing Router Advertisements with user options the kernel builds an RTM_NEWNDUSEROPT netlink message. The nduseroptmsg struct has three padding fields that are never zeroed and can leak kernel data The fix is simple, just zeroes the padding fields.

The following products are affected by CVE-2026-43040 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-43040.

URL	Resource
https://git.kernel.org/stable/c/11d7fe97421cfc81549940c20ed5ac9472d6db05
https://git.kernel.org/stable/c/1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c
https://git.kernel.org/stable/c/2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648
https://git.kernel.org/stable/c/4f810c686fde509d1cdaa706322d9d2531f8f1a4
https://git.kernel.org/stable/c/7f56d87e527bb5a13c3e8b0d5840cb6332822f6d
https://git.kernel.org/stable/c/ae05340ccaa9d347fe85415609e075545bec589f
https://git.kernel.org/stable/c/b485eef3d97b7aae55ce669b6de555ec81f3d21c
https://git.kernel.org/stable/c/ef3645606e4a635d5062a492f22b7f490852ee67