Bug 2562227 (CVE-2026-117973)

Summary:	CVE-2026-117973 firefox: thunderbird: Use-after-free in the Networking: DNS component
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gotiwari, jhorak, mvyas, rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Networking: DNS component	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 2026-10-27 18:20:26 UTC

Use-after-free in the Networking: DNS component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

Comment 1 Jon Orris 2026-11-02 17:02:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:93956 https://access.redhat.com/errata/RHSA-2026:93956

Comment 2 Jon Orris 2026-11-02 18:03:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:93957 https://access.redhat.com/errata/RHSA-2026:93957

Comment 3 Jon Orris 2026-11-03 07:42:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:94405 https://access.redhat.com/errata/RHSA-2026:94405