{"id":"UBUNTU-CVE-2019-20454","details":"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.","modified":"2026-04-22T12:17:03.319755Z","published":"2020-02-14T14:15:00Z","upstream":["CVE-2019-20454"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20454"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20454"}],"affected":[{"package":{"name":"pcre2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pcre2@10.31-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.22-3","10.22-4","10.22-5","10.22-6","10.31-2","10.31-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpcre2-16-0","binary_version":"10.31-2ubuntu0.1~esm1"},{"binary_name":"libpcre2-32-0","binary_version":"10.31-2ubuntu0.1~esm1"},{"binary_name":"libpcre2-8-0","binary_version":"10.31-2ubuntu0.1~esm1"},{"binary_version":"10.31-2ubuntu0.1~esm1","binary_name":"libpcre2-posix0"},{"binary_name":"pcre2-utils","binary_version":"10.31-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20454.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}