CVE-2026-89156

A flaw was found in PCRE2. An attacker can provide invalid UTF (Unicode Transformation Format) data, leading to an out-of-bounds read during a Just-In-Time (JIT) fallback. This vulnerability could potentially result in a denial of service.

An out-of-bounds read can occur in PCRE2 when processing specially crafted invalid UTF data during a JIT fallback. Exploitation requires an application using PCRE2 to process untrusted input with JIT enabled, which may lead to a denial of service or information disclosure.

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.