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.
Metrics
CVSS 3.1 7.1/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 31910575a9de61e78065e93846e8e7a4894a18bf, < 1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < 2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < 11d7fe97421cfc81549940c20ed5ac9472d6db05; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < 7f56d87e527bb5a13c3e8b0d5840cb6332822f6d; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < 4f810c686fde509d1cdaa706322d9d2531f8f1a4; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < b485eef3d97b7aae55ce669b6de555ec81f3d21c; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < ef3645606e4a635d5062a492f22b7f490852ee67; >= 31910575a9de61e78065e93846e8e7a4894a18bf, < ae05340ccaa9d347fe85415609e075545bec589f |
| Linux | Linux | 2.6.24 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | >= V3.1.7, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | >= V3.1.6, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | >= V3.1.7, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | >= V3.1.6, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | >= V3.1.5, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | >= V3.1.7, < * |
References
- https://git.kernel.org/stable/c/11d7fe97421cfc81549940c20ed5ac9472d6db05Patch
- https://git.kernel.org/stable/c/1da9023f6b071a38e5430ffbce4b70b2b1ac4f9cPatch
- https://git.kernel.org/stable/c/2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648Patch
- https://git.kernel.org/stable/c/4f810c686fde509d1cdaa706322d9d2531f8f1a4Patch
- https://git.kernel.org/stable/c/7f56d87e527bb5a13c3e8b0d5840cb6332822f6dPatch
- https://git.kernel.org/stable/c/ae05340ccaa9d347fe85415609e075545bec589fPatch
- https://git.kernel.org/stable/c/b485eef3d97b7aae55ce669b6de555ec81f3d21cPatch
- https://git.kernel.org/stable/c/ef3645606e4a635d5062a492f22b7f490852ee67Patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
Timeline
- Published
- May 1, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Modified