Stack-based Buffer Overflow Affecting oniguruma package, versions <0:6.9.10-4.1.hum1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-ONIGURUMA-16079889
- published16 Apr 2026
- disclosed22 May 2017
Introduced: 22 May 2017
CVE-2017-9225 (opens in a new tab)How to fix?
Upgrade RHEL:10 oniguruma to version 0:6.9.10-4.1.hum1 or higher.
This issue was patched in RHSA-2026:7545.
NVD Description
Note: Versions mentioned in the description apply only to the upstream oniguruma package and not the oniguruma package as distributed by RHEL.
See How to fix? for RHEL:10 relevant fixed versions and status.
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 stack out-of-bounds write in onigenc_unicode_get_case_fold_codes_by_str() occurs during regular expression compilation. Code point 0xFFFFFFFF is not properly handled in unicode_unfold_key(). A malformed regular expression could result in 4 bytes being written off the end of a stack buffer of expand_case_fold_string() during the call to onigenc_unicode_get_case_fold_codes_by_str(), a typical stack buffer overflow.