CVE-2019-19204
An issue was discovered in Oniguruma 6.x before 6.9.4_rc2.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function fetch_interval_quantifier (formerly known as fetch_range_quantifier) in regparse.c, PFETCH is called without checking PEND. This leads to a heap-based buffer over-read.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 6.89% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- oniguruma project/oniguruma · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 6.9% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/ManhNDd/CVE-2019-19204Exploit, Third Party Advisory
- https://github.com/kkos/oniguruma/issues/162Exploit, Patch, Third Party Advisory
- https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2Release Notes
- https://github.com/tarantula-team/CVE-2019-19204Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00002.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL/
- https://usn.ubuntu.com/4460-1/
- https://github.com/ManhNDd/CVE-2019-19204Exploit, Third Party Advisory
- https://github.com/kkos/oniguruma/issues/162Exploit, Patch, Third Party Advisory
- https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2Release Notes
- https://github.com/tarantula-team/CVE-2019-19204Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00002.htmlThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL/
- https://usn.ubuntu.com/4460-1/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.