Bug 2456342 (CVE-2026-27143)

Summary:	CVE-2026-27143 golang: cmd/compile: possible memory corruption after bound check elimination
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbrownin, caswilli, crizzo, fdeutsch, kaycoth, oramraz, smullick, stirabos, thason
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the cmd/compile package in the Go standard library. The compiler fails to correctly check for integer overflow or underflow in arithmetic operations involving loop induction variables. As a result, the compiler allows invalid memory indexing to occur at runtime, potentially leading to memory corruption.	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:
Bug Depends On:	2456588
Bug Blocks:

Description OSIDB Bzimport 2026-04-08 02:01:52 UTC

Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.

Comment 3 errata-xmlrpc 2026-04-23 21:36:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:10217 https://access.redhat.com/errata/RHSA-2026:10217

Comment 4 errata-xmlrpc 2026-04-24 02:33:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:10219 https://access.redhat.com/errata/RHSA-2026:10219

Comment 5 errata-xmlrpc 2026-04-27 02:09:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:10704 https://access.redhat.com/errata/RHSA-2026:10704

Comment 6 errata-xmlrpc 2026-05-11 16:19:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:16024 https://access.redhat.com/errata/RHSA-2026:16024

Comment 7 errata-xmlrpc 2026-05-11 18:32:00 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:16021 https://access.redhat.com/errata/RHSA-2026:16021