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Vulnerability record · CVE-2019-9023 · published 22 February 2019

CVE-2019-9023: Php out-of-bounds read vulnerability

Php · Php

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A number of heap-based buffer over-read instances are present in mbstring regular expression functions when supplied with invalid multibyte data. These occur in ext/mbstring/oniguruma/regcomp.c, ext/mbstring/oniguruma/regexec.c, ext/mbstring/oniguruma/regparse.c, ext/mbstring/oniguruma/enc/unicode.c, and ext/mbstring/oniguruma/src/utf32_be.c when a multibyte regular expression pattern contains invalid multibyte sequences.

9.8 CVSS 3.0 Critical EPSS 9.3% · top 4.8% CWE-125 · Out-of-bounds read
9.8CVSS 3.0 base score, v2 7.5
9.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
38References, 14 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A number of heap-based buffer over-read instances are present in mbstring regular expression functions when supplied with invalid multibyte data. These occur in ext/mbstring/oniguruma/regcomp.c, ext/mbstring/oniguruma/regexec.c, ext/mbstring/oniguruma/regparse.c, ext/mbstring/oniguruma/enc/unicode.c, and ext/mbstring/oniguruma/src/utf32_be.c when a multibyte regular expression pattern contains invalid multibyte sequences.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html
http://www.securityfocus.com/bid/107156 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:2519
https://access.redhat.com/errata/RHSA-2019:3299
https://bugs.php.net/bug.php?id=77370 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77371 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77381 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77382 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77385 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77394 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77418 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20190321-0001/ PatchThird Party Advisory
https://support.f5.com/csp/article/K06372014 Third Party Advisory
https://usn.ubuntu.com/3902-1/ Third Party Advisory
https://usn.ubuntu.com/3902-2/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4398 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html
http://www.securityfocus.com/bid/107156 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:2519
https://access.redhat.com/errata/RHSA-2019:3299
https://bugs.php.net/bug.php?id=77370 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77371 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77381 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77382 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77385 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77394 ExploitIssue TrackingPatchVendor Advisory
https://bugs.php.net/bug.php?id=77418 ExploitIssue TrackingPatchVendor Advisory
https://security.netapp.com/advisory/ntap-20190321-0001/ PatchThird Party Advisory
https://support.f5.com/csp/article/K06372014 Third Party Advisory
https://usn.ubuntu.com/3902-1/ Third Party Advisory
https://usn.ubuntu.com/3902-2/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4398 Third Party Advisory

Track CVE-2019-9023 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2019-9023), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.