Bug 2492363 (CVE-2026-53006)

Summary:	CVE-2026-53006 kernel: ipv6: fix possible UAF in icmpv6_rcv()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	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 the Linux kernel's IPv6 (Internet Protocol version 6) implementation. This vulnerability, a Use-After-Free (UAF) error, occurs due to incorrect caching of network packet addresses before a memory operation. An attacker could potentially exploit this flaw to cause memory corruption, which may lead to a denial of service or, in some scenarios, 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 2026-06-24 18:07:59 UTC

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

ipv6: fix possible UAF in icmpv6_rcv()

Caching saddr and daddr before pskb_pull() is problematic
since skb->head can change.

Remove these temporary variables:

- We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr
  when net_dbg_ratelimited() is called in the slow path.

- Avoid potential future misuse after pskb_pull() call.

Comment 1 Keith Grant 2026-06-25 19:35:09 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062448-CVE-2026-53006-2b02@gregkh/T

Comment 3 errata-xmlrpc 2026-07-24 14:31:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:45192 https://access.redhat.com/errata/RHSA-2026:45192

Comment 4 errata-xmlrpc 2026-07-28 03:29:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:47010 https://access.redhat.com/errata/RHSA-2026:47010

Comment 5 errata-xmlrpc 2026-07-28 03:40:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:47011 https://access.redhat.com/errata/RHSA-2026:47011

Comment 6 errata-xmlrpc 2026-07-28 06:29:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:47017 https://access.redhat.com/errata/RHSA-2026:47017

Comment 7 errata-xmlrpc 2026-09-01 09:28:59 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-2026:61932 https://access.redhat.com/errata/RHSA-2026:61932

Comment 8 errata-xmlrpc 2026-09-02 11:02:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:62568 https://access.redhat.com/errata/RHSA-2026:62568

Comment 9 errata-xmlrpc 2026-09-08 00:23:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:64767 https://access.redhat.com/errata/RHSA-2026:64767

Comment 10 errata-xmlrpc 2026-09-09 00:35:47 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-2026:65710 https://access.redhat.com/errata/RHSA-2026:65710

Comment 11 errata-xmlrpc 2026-09-09 00:40:38 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-2026:65711 https://access.redhat.com/errata/RHSA-2026:65711

Comment 12 errata-xmlrpc 2026-09-09 00:57:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:65712 https://access.redhat.com/errata/RHSA-2026:65712