Debian Security Advisory

DLA-3363-1 pcre2 -- LTS security update

Date Reported:
16 Mar 2023
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 1011954.
In Mitre's CVE dictionary: CVE-2019-20454, CVE-2022-1586, CVE-2022-1587.
More information:

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.

  • CVE-2019-20454

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

  • CVE-2022-1586

    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.

  • CVE-2022-1587

    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 10.32-5+deb10u1.

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: