What’s Vulnerable › Vulnerabilities

CVE-2019-16163

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-09-09 · updated 2026-06-17
• Weakness: CWE-674

Description

Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.

Affected products

• Canonical Ubuntu Linux: 14.04
• Debian Linux: 8.0
• Fedoraproject Fedora: 29, 30
• Oniguruma Project Oniguruma: before 6.9.3 — fixed in 6.9.3

How to fix

Upgrade to a fixed version: Oniguruma Project Oniguruma 6.9.3. Check the vendor advisory for mitigations.

References

• https://github.com/kkos/oniguruma/commit/4097828d7cc87589864fecf452f2cd46c5f37180
• https://github.com/kkos/oniguruma/compare/v6.9.2...v6.9.3
• https://github.com/kkos/oniguruma/issues/147
• https://lists.debian.org/debian-lts-announce/2019/09/msg00010.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NWOWZZNFSAWM3BUTQNAE3PD44A6JU4KE/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZW47MSFZ6WYOAOFXHBDGU4LYACFRKC2Y/
• https://usn.ubuntu.com/4460-1/
• https://github.com/kkos/oniguruma/commit/4097828d7cc87589864fecf452f2cd46c5f37180
• https://github.com/kkos/oniguruma/compare/v6.9.2...v6.9.3
• https://github.com/kkos/oniguruma/issues/147
• https://lists.debian.org/debian-lts-announce/2019/09/msg00010.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NWOWZZNFSAWM3BUTQNAE3PD44A6JU4KE/

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