Bug 2414521 (CVE-2025-40135)

Summary:	CVE-2025-40135 kernel: ipv6: use RCU in ip6_xmit()
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	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A use-after-free flaw was found in ip6_autoflowlabel in the Linux kernel's net/ipv6/ip6_output.c code. In this flaw an attacker can cause a denial of service (DoS) attack.	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 2025-11-12 11:05:21 UTC

In the Linux kernel, the following vulnerability has been resolved:

ipv6: use RCU in ip6_xmit()

Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent
possible UAF.

Comment 1 Alexander B 2025-11-13 12:48:29 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40135-67ca@gregkh/T

Comment 3 errata-xmlrpc 2026-02-02 09:50:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:1690 https://access.redhat.com/errata/RHSA-2026:1690

Comment 5 errata-xmlrpc 2026-02-09 02:13:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:2212 https://access.redhat.com/errata/RHSA-2026:2212

Comment 6 errata-xmlrpc 2026-02-09 04:38:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2264 https://access.redhat.com/errata/RHSA-2026:2264

Comment 7 errata-xmlrpc 2026-02-10 02:00:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2378 https://access.redhat.com/errata/RHSA-2026:2378

Comment 10 errata-xmlrpc 2026-06-04 10:22:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:23237 https://access.redhat.com/errata/RHSA-2026:23237

Comment 11 errata-xmlrpc 2026-06-04 15:45:34 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-2026:22964 https://access.redhat.com/errata/RHSA-2026:22964

Comment 12 errata-xmlrpc 2026-06-11 10:53:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:25218 https://access.redhat.com/errata/RHSA-2026:25218

Comment 13 errata-xmlrpc 2026-06-12 19:51:36 UTC

This issue has been addressed in the following products:

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

Via RHSA-2026:25533 https://access.redhat.com/errata/RHSA-2026:25533

Comment 14 errata-xmlrpc 2026-06-17 01:13:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:26462 https://access.redhat.com/errata/RHSA-2026:26462

Comment 15 errata-xmlrpc 2026-06-17 06:33:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:26515 https://access.redhat.com/errata/RHSA-2026:26515

Comment 16 errata-xmlrpc 2026-06-17 09:18:32 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-2026:26535 https://access.redhat.com/errata/RHSA-2026:26535