CVE Watch21 ago 2026

CVE-2026-63388

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 wh

CVSS

8.4

Alto

EPSS

0.1%

KEV

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Exploit Today

0-100

Publicado: 20 ago 2026 · Última mod.: 21 ago 2026 · CWE-617 · CWE-787

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-08-212026-08-22

Descripción técnica

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.

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