CVE-2019-9023: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2019-9023 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 9.32% chance of exploitation in the next 30 days, higher than 95.3% of scored vulnerabilities. 7 public exploits are recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 15 · Related 10Timeline
- 22-02-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
9.32%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
No change 0.00 pp
From 9.32% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
7 foundExploit Reference (bugs.php.net)
Maturity: unknown
Exploit Reference (bugs.php.net)
Maturity: unknown
Exploit Reference (bugs.php.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- php5< 5.5.9+dfsg-1ubuntu4.27
- php7.0< 7.0.33-0ubuntu0.16.04.2
- php7.2< 7.2.15-0ubuntu0.18.04.1
Alpine1 product
- php7< 7.2.14-r0 | < 7.2.17-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04
Debian1 product
- debian_linuxEOL9.0
Netapp1 product
Opensuse1 product
- leapEOL42.3
Php1 product
- php< 5.6.40 | ≥ 7.0.0, < 7.1.26 | ≥ 7.2.0, < 7.2.14 | ≥ 7.3.0, < 7.3.1
7 vendors · 9 products
References
24 links
Show all 24 references
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory