CVE-2022-28738

9.8 criticalEPSS 3.1%

Critical (9.8) in ruby-lang ruby. EPSS 3.1% chance of exploitation in the next 30 days.

A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
CWE: CWE-415
Published: 2022-05-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

ruby-lang:ruby

References

https://hackerone.com/reports/1220911
https://security-tracker.debian.org/tracker/CVE-2022-28738
https://security.gentoo.org/glsa/202401-27
https://security.netapp.com/advisory/ntap-20220624-0002/
https://www.ruby-lang.org/en/news/2022/04/12/double-free-in-regexp-compilation-cve-2022-28738/

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