CVE-2026-43040

HIGH EPSS 1.9%
Published May 1, 20262mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published May 1, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-909

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥2.6.24  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

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

Remediation

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