Bug 2493411 (CVE-2026-14164) - CVE-2026-14164 libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack()
Summary: CVE-2026-14164 libarchive: Double-Free Vulnerability in RAR5 Decompression Lo...
Keywords:
Status: NEW
Alias: CVE-2026-14164
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2494761 2494762 2494763
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-26 13:02 UTC by OSIDB Bzimport
Modified: 2026-08-24 23:20 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:53125 0 None None None 2026-08-10 23:29:29 UTC
Red Hat Product Errata RHBA-2026:53465 0 None None None 2026-08-11 13:37:22 UTC
Red Hat Product Errata RHBA-2026:53466 0 None None None 2026-08-11 13:37:46 UTC
Red Hat Product Errata RHBA-2026:54211 0 None None None 2026-08-12 07:33:59 UTC
Red Hat Product Errata RHBA-2026:54340 0 None None None 2026-08-12 17:36:45 UTC
Red Hat Product Errata RHBA-2026:59232 0 None None None 2026-08-24 23:20:44 UTC
Red Hat Product Errata RHSA-2026:52674 0 None None None 2026-08-10 08:47:05 UTC
Red Hat Product Errata RHSA-2026:52675 0 None None None 2026-08-10 08:28:08 UTC
Red Hat Product Errata RHSA-2026:54769 0 None None None 2026-08-18 12:25:40 UTC
Red Hat Product Errata RHSA-2026:56954 0 None None None 2026-08-19 12:11:39 UTC
Red Hat Product Errata RHSA-2026:58558 0 None None None 2026-08-24 03:25:34 UTC
Red Hat Product Errata RHSA-2026:58573 0 None None None 2026-08-24 04:27:11 UTC
Red Hat Product Errata RHSA-2026:58574 0 None None None 2026-08-24 04:28:04 UTC

Description OSIDB Bzimport 2026-06-26 13:02:01 UTC 
A double-free vulnerability exists in the libarchive RAR5 reader subsystem within archive_read_support_format_rar5.c where the state tracking pointer rar->cstate.filtered_buf can be linked to a temporary filter output block during archive decompression. When the unpacking engine subsequently processes an adjacent file or resets its internal state layout via init_unpack(), it releases the allocation mapped to filtered_buf but fails to clear or nullify the underlying pointer variable. A specially crafted RAR5 archive can exploit this lingering dangling pointer by forcing a secondary release operation on the exact same memory address, triggering a standard memory-manager abort that immediately crashes the application and results in a Denial of Service (DoS).
Comment 3 errata-xmlrpc 2026-08-10 08:28:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:52675 https://access.redhat.com/errata/RHSA-2026:52675
Comment 4 errata-xmlrpc 2026-08-10 08:47:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:52674 https://access.redhat.com/errata/RHSA-2026:52674
Comment 5 errata-xmlrpc 2026-08-18 12:25:39 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:54769 https://access.redhat.com/errata/RHSA-2026:54769
Comment 6 errata-xmlrpc 2026-08-19 12:11:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:56954 https://access.redhat.com/errata/RHSA-2026:56954
Comment 7 errata-xmlrpc 2026-08-24 03:25:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:58558 https://access.redhat.com/errata/RHSA-2026:58558
Comment 8 errata-xmlrpc 2026-08-24 04:27:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:58573 https://access.redhat.com/errata/RHSA-2026:58573
Comment 9 errata-xmlrpc 2026-08-24 04:28:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:58574 https://access.redhat.com/errata/RHSA-2026:58574
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