CVE-2019-13224
A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.05% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- oniguruma project/oniguruma · php/php · fedoraproject/fedora · debian/debian linux · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 4.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/kkos/oniguruma/commit/0f7f61ed1b7b697e283e37bd2d731d0bd57adb55Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00013.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWCPDTZOIUKGMFAD5NAKUB7FPJFAIQN5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SNL26OZSQRVLEO6JRNUVIMZTICXBNEQW/
- https://security.gentoo.org/glsa/201911-03Third Party Advisory
- https://support.f5.com/csp/article/K00103182Third Party Advisory
- https://support.f5.com/csp/article/K00103182?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4088-1/Third Party Advisory
- https://github.com/kkos/oniguruma/commit/0f7f61ed1b7b697e283e37bd2d731d0bd57adb55Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00013.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWCPDTZOIUKGMFAD5NAKUB7FPJFAIQN5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SNL26OZSQRVLEO6JRNUVIMZTICXBNEQW/
- https://security.gentoo.org/glsa/201911-03Third Party Advisory
- https://support.f5.com/csp/article/K00103182Third Party Advisory
- https://support.f5.com/csp/article/K00103182?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4088-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.