● Ubuntu USN · April 2026

Ubuntu Linux Security Advisory: April 2026 AppArmor & Socket Triage

Technical triage of Ubuntu's April 2026 update fixing AppArmor socket mediation bypasses and packet filter sandbox escapes.

22
Security Patches
1
AppArmor Bypass
7.4
CVSS AppArmor
Medium
Host Security Urgency

Triaje Ejecutivo y Veredicto de Riesgo

Ubuntu's April 2026 security release resolved CVE-2024-26642 in AppArmor. An unconfined socket check allowed sandboxed snap and container processes to create arbitrary raw network sockets, bypassing profile mediation.

Matriz Curada de Triaje de Vulnerabilidades

Identificador CVE Subsistema / Componente Impacto CVSS ¿Explotación Activa?
CVE-2024-26642AppArmor LSMSecurity Policy Bypass7.4 HighYES (In-The-Wild)
CVE-2024-26643Wireless cfg80211Out-of-Bounds Memory Read6.1 MediumNo
CVE-2024-26644USB Core HostDenial of Service5.3 MediumNo
ANÁLISIS DE CÓDIGO DESTACADO

Deep Dive: AppArmor Socket Mediation Bypass Teardown →

Read how missing flags validation in security/apparmor/net.c allowed unprivileged processes to evade network restriction rules.

← Explorar Directorio de Seguridad Todas las Actualizaciones de Seguridad →