CVE-2026-63383

A flaw was found in Libevent, an event notification library. A remote attacker could exploit an out-of-bounds read vulnerability in the decode_tag_internal() function by sending specially crafted, attacker-controlled tagged RPC (Remote Procedure Call) data. This could lead to a denial of service, causing the process that decodes the data to crash.

This Important flaw in libevent can lead to a denial of service. An attacker could send specially crafted RPC data to a service utilizing libevent, causing an out-of-bounds read and crashing the application. This vulnerability primarily affects applications that process untrusted RPC data using libevent.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.