CVE-2026-43040
Estado: ModificadaAlta (7.1)—
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
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 6
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1005Data from Local Systemcollection90 % - Impacto secundario
T1552Unsecured Credentialscredential access85 %
Vulnerabilidad local (AV:L/PR:L) que permite lectura de memoria kernel (info-leak) sin interacción; CWE-909 confirma fuga de datos no inicializados.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-909
Referencias
- 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
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
JSON original (NVD)
Mostrar
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