USN-6055-1 fixed a vulnerability in Ruby. Unfortunately it introduced a regression. This update reverts the patches applied to CVE-2023-28755 in order to fix the regression pending further investigation. We apologize for the inconvenience. Original advisory details: It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service. (CVE-2023-28755)
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