Vulnerability Description
A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://hackerone.com/reports/1399856
- https://www.ruby-lang.org/en/news/2024/03/21/buffer-overread-cve-2024-27280/
- http://seclists.org/fulldisclosure/2025/Sep/53
- http://seclists.org/fulldisclosure/2025/Sep/54
- http://seclists.org/fulldisclosure/2025/Sep/55
- https://hackerone.com/reports/1399856
- https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://security.netapp.com/advisory/ntap-20250502-0003/
- https://www.ruby-lang.org/en/news/2024/03/21/buffer-overread-cve-2024-27280/
FAQ
What is CVE-2024-27280?
CVE-2024-27280 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a ...
How severe is CVE-2024-27280?
CVE-2024-27280 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2024-27280?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.