CVE-2026-43040

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
History

08 May 2026, 18:53

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/11d7fe97421cfc81549940c20ed5ac9472d6db05 - () https://git.kernel.org/stable/c/11d7fe97421cfc81549940c20ed5ac9472d6db05 - Patch
References () https://git.kernel.org/stable/c/1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c - () https://git.kernel.org/stable/c/1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c - Patch
References () https://git.kernel.org/stable/c/2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648 - () https://git.kernel.org/stable/c/2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648 - Patch
References () https://git.kernel.org/stable/c/4f810c686fde509d1cdaa706322d9d2531f8f1a4 - () https://git.kernel.org/stable/c/4f810c686fde509d1cdaa706322d9d2531f8f1a4 - Patch
References () https://git.kernel.org/stable/c/7f56d87e527bb5a13c3e8b0d5840cb6332822f6d - () https://git.kernel.org/stable/c/7f56d87e527bb5a13c3e8b0d5840cb6332822f6d - Patch
References () https://git.kernel.org/stable/c/ae05340ccaa9d347fe85415609e075545bec589f - () https://git.kernel.org/stable/c/ae05340ccaa9d347fe85415609e075545bec589f - Patch
References () https://git.kernel.org/stable/c/b485eef3d97b7aae55ce669b6de555ec81f3d21c - () https://git.kernel.org/stable/c/b485eef3d97b7aae55ce669b6de555ec81f3d21c - Patch
References () https://git.kernel.org/stable/c/ef3645606e4a635d5062a492f22b7f490852ee67 - () https://git.kernel.org/stable/c/ef3645606e4a635d5062a492f22b7f490852ee67 - Patch
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.1
CWE CWE-909
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*

01 May 2026, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-01 15:16

Updated : 2026-05-08 18:53

NVD link : CVE-2026-43040

Mitre link : CVE-2026-43040

CVE.ORG link : CVE-2026-43040

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-909

Missing Initialization of Resource