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Vulnerability record · CVE-2022-28738 · published 9 May 2022

CVE-2022-28738: Ruby-lang ruby double free vulnerability

Ruby Lang · Ruby

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.

9.8 CVSS 3.1 Critical EPSS 2.9% · top 13.6% CWE-415 · Double free
9.8CVSS 3.1 base score, v2 7.5
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2022-28738), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.