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CVE-2026-63388

CVE-2026-63388 · Libevent: Heap out-of-bounds write in bufferevent_socket_set_conn_address_ reachable via AF_UNIX accept

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a heap out-of-bounds write in bufferevent_sock.c when bufferevent_socket_set_conn_address_ copies a kernel-supplied AF_UNIX peer address into bufferevent_private.conn_address. Release builds compiled with NDEBUG disable the EVUTIL_ASSERT length guard, and the evhttp accept path can pass a 110-byte sockaddr from accept() into the 28-byte field. An unauthenticated local peer able to connect to an AF_UNIX listener can overwrite the adjacent dns_request pointer and heap data, causing memory corruption with confidentiality, integrity, and availability impact. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

CVSS 8.4 · Alta · EPSS 0,1% · Corrección disponible

Publicación
Actualización

Pila tecnológica: system

Productos y versiones afectados

  • libevent

    Versiones
    • < 2.1.13: Afectada
    • >= 2.2.0-alpha, < 2.2.2-alpha: Afectada

    Sin corrección publicada

  • libevent Debian:12

    Versiones
    • 2.1.12-stable-8
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-8+deb12u1

    Actualiza a 2.1.12-stable-8+deb12u1

  • libevent Debian:13

    Versiones
    • 2.1.12-stable-10
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.13-stable-1~deb13u1

    Actualiza a 2.1.13-stable-1~deb13u1

  • libevent Debian:14

    Versiones
    • 2.1.12-stable-10
    • 2.1.13-stable-1~deb13u1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.13-stable-1

    Actualiza a 2.1.13-stable-1

  • libevent Ubuntu:Pro:18.04:LTS

    Versiones
    • 2.1.8-stable-4
    • 2.1.8-stable-4build1
    • 2.1.8-stable-4ubuntu0.1~esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.8-stable-4ubuntu0.1~esm2

    Actualiza a 2.1.8-stable-4ubuntu0.1~esm2

  • libevent Ubuntu:Pro:20.04:LTS

    Versiones
    • 2.1.8-stable-4build1
    • 2.1.11-stable-1~exp0
    • 2.1.11-stable-1
    • 2.1.11-stable-1ubuntu0.1~esm1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.11-stable-1ubuntu0.1~esm2

    Actualiza a 2.1.11-stable-1ubuntu0.1~esm2

  • libevent Ubuntu:22.04:LTS

    Versiones
    • 2.1.12-stable-1
    • 2.1.12-stable-1build1
    • 2.1.12-stable-1build2
    • 2.1.12-stable-1build3
    • 2.1.12-stable-1ubuntu0.1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-1ubuntu0.2

    Actualiza a 2.1.12-stable-1ubuntu0.2

  • libevent Ubuntu:24.04:LTS

    Versiones
    • 2.1.12-stable-9
    • 2.1.12-stable-9ubuntu2
    • 2.1.12-stable-9ubuntu2.1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-9ubuntu2.2

    Actualiza a 2.1.12-stable-9ubuntu2.2

  • libevent Ubuntu:26.04:LTS

    Versiones
    • 2.1.12-stable-10build1
    • 2.1.12-stable-10build2
    • 2.1.12-stable-10ubuntu0.1
    Intervalos de versiones afectados
    • ECOSYSTEM: < 2.1.12-stable-10ubuntu0.2

    Actualiza a 2.1.12-stable-10ubuntu0.2

Fuentes originales

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