Is CVE-2019-20454 actively exploited?

CVE-2019-20454 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2019-20454?

CVE-2019-20454 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2019-20454?

Patch guidance is available from pcre security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2019-20454.

Fix CVE-2019-20454 - HIGH pcre pcre2

Q: Which products are affected by CVE-2019-20454?

5 products: pcre pcre2, fedoraproject fedora, splunk universal forwarder, splunk universal forwarder, splunk universal forwarder.

Description

An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-125 · Out-of-bounds Read

Metadata

Primary Vendor: PCRE
Published: 2/14/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

pcre : pcre2fedoraproject : fedorasplunk : universal_forwardersplunk : universal_forwardersplunk : universal_forwarder

Remediation Guidance

Executive Summary

Cite this page

CVE-2019-20454. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2019-20454

View on NIST NVD

CVE-2019-20454 vulnerability