CVE-2019-16163: canonical ubuntu_linux Uncontrolled Recursion
Vulnerability summary
CVE-2019-16163 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in canonical ubuntu_linux. EPSS estimates a 2.75% chance of exploitation in the next 30 days, higher than 86.2% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 3Timeline
- 09-09-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.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
2.75%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.75% 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
1 foundOniguruma
Maturity: poc
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 | < 5.9.5-3.2+deb8u3
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL14.04
Fedoraproject1 product
- fedoraEOL29 | 30
Oniguruma_project1 product
- oniguruma< 6.9.3
Ubuntu1 product
- libonig< 5.9.1-1ubuntu1.1+esm2 | < 5.9.6-1ubuntu0.1+esm2 | < 6.7.0-1ubuntu0.1~esm2
5 vendors · 6 products
References
12 links- github.com/kkos/oniguruma/issues/147X Refsource MISCExploitIssue TrackingPatchThird Party AdvisoryREPORT
- github.com/kkos/oniguruma/commit/4097828d7cc87589864fecf452f2cd46c5f37180X Refsource MISCPatchREPORT
lists.debian.org/debian-lts-announce/2019/09/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory