Bug 2539842 (CVE-2026-93577)

Summary:	CVE-2026-93577 ruby: integer overflow issue in regular expression compiler
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	akhatavk, anthomas, aos-team-art-private, asdas, dpaolell, ehelms, ggainey, jdelft, jpasqual, jupierce, juwatts, lblicha, lgarciaa, mbiarnes, mdellweg, mhulan, nmoumoul, ogajduse, osousa, pcreech, ppalepu, ppostler, prdhamdh, rchan, rhel-process-autobot, sdawley, sghai, sidsharm, smallamp, suppawar, tmalecek, vlaad, watson-tool-maintainers, zhunting
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Ruby. When compiling a specially crafted regular expression with the methods Regexp.new, Regexp.union, Regexp.compile, or via a string interpolation such as /#{input}/, an integer overflow in the size of the compiled pattern can occur. This integer overflow causes memory corruption, potentially resulting in arbitrary code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-23 23:21:33 UTC

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary code on the GitLab server due to an integer overflow issue when compiling a specially crafted regular expression in a CI/CD configuration.

Comment 11 Jon Orris 2026-11-05 19:40:18 UTC

This issue has been addressed in the following products:

  Red Hat Satellite 6.17 for RHEL 9

Via RHSA-2026:95656 https://access.redhat.com/errata/RHSA-2026:95656

Comment 12 Jon Orris 2026-11-05 19:44:15 UTC

This issue has been addressed in the following products:

  Red Hat Satellite 6.18 for RHEL 9

Via RHSA-2026:95657 https://access.redhat.com/errata/RHSA-2026:95657

Comment 13 Jon Orris 2026-11-05 19:44:29 UTC

This issue has been addressed in the following products:

  Red Hat Satellite 6.16 for RHEL 8
  Red Hat Satellite 6.16 for RHEL 9

Via RHSA-2026:95655 https://access.redhat.com/errata/RHSA-2026:95655