Bug 2405713 (CVE-2023-53705)

Summary:	CVE-2023-53705 kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()
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:	An out of bounds (OOB) memory access flaw was found in the Linux kernel's ipv6 network subsystem. This could allow a local attacker to crash the system or leak kernel internal information.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-10-22 14:01:26 UTC

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

ipv6: Fix out-of-bounds access in ipv6_find_tlv()

optlen is fetched without checking whether there is more than one byte to parse.
It can lead to out-of-bounds access.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Comment 1 Jon Moroney 2025-10-22 18:24:14 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102212-CVE-2023-53705-38d9@gregkh/T

Comment 5 errata-xmlrpc 2026-01-14 00:07:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:0537 https://access.redhat.com/errata/RHSA-2026:0537

Comment 6 errata-xmlrpc 2026-01-14 00:13:46 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-2026:0533 https://access.redhat.com/errata/RHSA-2026:0533

Comment 7 errata-xmlrpc 2026-01-14 00:20:24 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-2026:0532 https://access.redhat.com/errata/RHSA-2026:0532

Comment 8 errata-xmlrpc 2026-01-14 09:47:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:0576 https://access.redhat.com/errata/RHSA-2026:0576

Comment 10 errata-xmlrpc 2026-01-19 01:15:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:0754 https://access.redhat.com/errata/RHSA-2026:0754

Comment 11 errata-xmlrpc 2026-01-19 01:32:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:0755 https://access.redhat.com/errata/RHSA-2026:0755

Comment 12 errata-xmlrpc 2026-01-28 00:23:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1443 https://access.redhat.com/errata/RHSA-2026:1443

Comment 13 errata-xmlrpc 2026-01-28 00:29:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:1441 https://access.redhat.com/errata/RHSA-2026:1441

Comment 14 errata-xmlrpc 2026-01-28 00:32:45 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:1442 https://access.redhat.com/errata/RHSA-2026:1442

Comment 15 errata-xmlrpc 2026-01-28 19:15:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:1512 https://access.redhat.com/errata/RHSA-2026:1512