Description
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.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/11d7fe97421cfc81549940c20ed5ac9472d6db05 Patch
- git.kernel.org/stable/c/1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c Patch
- git.kernel.org/stable/c/2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648 Patch
- git.kernel.org/stable/c/4f810c686fde509d1cdaa706322d9d2531f8f1a4 Patch
- git.kernel.org/stable/c/7f56d87e527bb5a13c3e8b0d5840cb6332822f6d Patch
- git.kernel.org/stable/c/ae05340ccaa9d347fe85415609e075545bec589f Patch
- git.kernel.org/stable/c/b485eef3d97b7aae55ce669b6de555ec81f3d21c Patch
- git.kernel.org/stable/c/ef3645606e4a635d5062a492f22b7f490852ee67 Patch
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 13 November 2026
- CWE
- CWE-909
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.