Buffer Over-read The advisory has been revoked - it doesn't affect any version of package rubygem-json  (opens in a new tab)

The Red Hat security team deemed this advisory irrelevant for RHEL:7.

Note: Versions mentioned in the description apply only to the upstream rubygem-json package and not the rubygem-json package as distributed by RHEL.

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.

• https://access.redhat.com/security/cve/CVE-2024-27280
• https://hackerone.com/reports/1399856
• https://www.ruby-lang.org/en/news/2024/03/21/buffer-overread-cve-2024-27280/