$ cve CVE-2017-9228 JSON

CVE-2017-9228

9.8

CRITICAL · CVSS 3.1 · EPSS 6.3% (pctl 93)

In your normal cycle

Critical by CVSS (9.8), but no sign of active exploitation.

Description

An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write occurs in bitset_set_range() during regular expression compilation due to an uninitialized variable from an incorrect state transition. An incorrect state transition in parse_char_class() could create an execution path that leaves a critical local variable uninitialized until it's used as an index, resulting in an out-of-bounds write memory corruption.

Scoring

CVSS	9.8 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS	6.26% — more likely to be exploited than 93% of all CVEs
Weakness	CWE-787
On CISA KEV	no
Public exploit	none known
Published	2017-05-24
Last modified	2026-06-17

Affected (2)

Vendor	Product
oniguruma project	oniguruma
php	php

References

→ the Explorer · watch your stack · NVD