Bug 2467450 (CVE-2026-5260)

Summary:	CVE-2026-5260 gnutls: gnutls: Information disclosure via heap overread in RSA key exchange
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, kshier, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, stcannon, suppawar, teagle, vlaad, watson-tool-maintainers, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.	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 2026-05-06 19:51:55 UTC

libgnutls: Fix overread in RSA key exchange with PKCS#11 keys
   For a server using an RSA key backed by a PKCS#11 token,
   a client sending an extremely short premaster secret
   during an RSA key exchange could trigger a short heap overread.

Comment 3 errata-xmlrpc 2026-06-16 16:39:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:26409 https://access.redhat.com/errata/RHSA-2026:26409

Comment 5 errata-xmlrpc 2026-06-25 18:07:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:30004 https://access.redhat.com/errata/RHSA-2026:30004

Comment 6 errata-xmlrpc 2026-06-29 02:30:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:30850 https://access.redhat.com/errata/RHSA-2026:30850

Comment 7 errata-xmlrpc 2026-06-29 02:48:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:30849 https://access.redhat.com/errata/RHSA-2026:30849

Comment 8 errata-xmlrpc 2026-06-29 09:47:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:32962 https://access.redhat.com/errata/RHSA-2026:32962

Comment 9 errata-xmlrpc 2026-06-29 15:07:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:33125 https://access.redhat.com/errata/RHSA-2026:33125

Comment 10 errata-xmlrpc 2026-07-20 06:28:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:41921 https://access.redhat.com/errata/RHSA-2026:41921

Comment 11 errata-xmlrpc 2026-07-22 12:55:06 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.19

Via RHSA-2026:40762 https://access.redhat.com/errata/RHSA-2026:40762

Comment 12 errata-xmlrpc 2026-08-26 15:55:35 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.18

Via RHSA-2026:57483 https://access.redhat.com/errata/RHSA-2026:57483

Comment 13 errata-xmlrpc 2026-08-31 02:04:34 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.16

Via RHSA-2026:56853 https://access.redhat.com/errata/RHSA-2026:56853

Comment 14 errata-xmlrpc 2026-09-03 08:59:00 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.17

Via RHSA-2026:60019 https://access.redhat.com/errata/RHSA-2026:60019

Comment 15 errata-xmlrpc 2026-09-03 12:01:24 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.12

Via RHSA-2026:59831 https://access.redhat.com/errata/RHSA-2026:59831

Comment 16 Jon Orris 2026-09-24 10:58:19 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.14

Via RHSA-2026:67837 https://access.redhat.com/errata/RHSA-2026:67837

Comment 17 Jon Orris 2026-10-15 13:53:35 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.13

Via RHSA-2026:77320 https://access.redhat.com/errata/RHSA-2026:77320

Comment 18 Jon Orris 2026-10-22 16:26:20 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.15

Via RHSA-2026:82811 https://access.redhat.com/errata/RHSA-2026:82811

Comment 19 Jon Orris 2026-10-27 11:58:37 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.21

Via RHSA-2026:89232 https://access.redhat.com/errata/RHSA-2026:89232

Comment 20 Jon Orris 2026-10-27 12:00:28 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.20

Via RHSA-2026:89333 https://access.redhat.com/errata/RHSA-2026:89333

Comment 21 Jon Orris 2026-10-27 12:20:56 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.19

Via RHSA-2026:89651 https://access.redhat.com/errata/RHSA-2026:89651

Comment 22 Jon Orris 2026-10-27 22:02:45 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:89197 https://access.redhat.com/errata/RHSA-2026:89197