CVE-2019-19246: canonical ubuntu_linux Out-of-bounds Read
Vulnerability summary
CVE-2019-19246 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 2.97% chance of exploitation in the next 30 days, higher than 87.2% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 4Timeline
- 25-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Oniguruma through 6.9.3, as used in PHP 7.3.x and other products, has a heap-based buffer over-read in str_lower_case_match in regexec.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.97%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 2.94% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- libonig< 6.9.4-1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL14.04
Fedoraproject1 product
- fedoraEOL31
Oniguruma_project1 product
- oniguruma≤ 6.9.3
Php1 product
- php≥ 7.3.0, < 7.3.10
Ubuntu1 product
- libonig< 5.9.1-1ubuntu1.1+esm2 | < 5.9.6-1ubuntu0.1+esm2 | < 6.7.0-1ubuntu0.1~esm2
6 vendors · 7 products
References
10 links- github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557bX Refsource MISCREPORTPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2019/12/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory