Debian 9813 Published by

A pcre2 security update has been released for Debian GNU/Linux 10 LTS to address multiple out-of-bounds read vulnerabilities.

DLA 3363-1: pcre2 security update

Debian LTS Advisory DLA-3363-1 Guilhem Moulin
March 16, 2023

Package : pcre2
Version : 10.32-5+deb10u1
CVE ID : CVE-2019-20454 CVE-2022-1586 CVE-2022-1587
Debian Bug : 1011954

Multiple out-of-bounds read vulnerabilities were found in pcre2, a Perl
Compatible Regular Expression library, which could result in information
disclosure or denial or service.


Out-of-bounds read when the pattern \X is JIT compiled and used to
match specially crafted subjects in non-UTF mode.


Out-of-bounds read involving unicode property matching in
JIT-compiled regular expressions. The issue occurs because the
character was not fully read in case-less matching within JIT.


Out-of-bounds read affecting recursions in JIT-compiled regular
expressions caused by duplicate data transfers.

This upload also fixes a subject buffer overread in JIT when UTF is
disabled and \X or \R has a greater than 1 fixed quantifier. This issue
was found by Yunho Kim.

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your pcre2 packages.

For the detailed security status of pcre2 please refer to
its security tracker page at:

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: