CVE Watch9 sept 2026

CVE-2026-63383

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent can read beyond a contiguous evbuffer region in event_t

CVSS

—

Sin CVSS

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Publicado: 20 ago 2026 · Última mod.: 9 sept 2026 · CWE-125

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-08-232026-09-21

Descripción técnica

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent can read beyond a contiguous evbuffer region in event_tagging.c when decode_tag_internal requests at most five bytes from evbuffer_pullup but iterates using the full logical buffer length. A fragmented evbuffer containing a six-byte malformed tag can therefore advance past the pullup window and trigger an out-of-bounds read, which can crash a process that decodes attacker-controlled tagged RPC data. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

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