Bug 2449006 (CVE-2026-4424) - CVE-2026-4424 libarchive: libarchive: Information disclosure via heap out-of-bounds read in RAR archive processing
Summary: CVE-2026-4424 libarchive: libarchive: Information disclosure via heap out-of-...
Keywords:
Status: NEW
Alias: CVE-2026-4424
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2449007 2449008 2449009
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-19 12:25 UTC by OSIDB Bzimport
Modified: 2026-05-08 20:57 UTC (History)
0 users

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-2026:12157 0 None None None 2026-04-30 11:04:29 UTC
Red Hat Product Errata RHBA-2026:8558 0 None None None 2026-04-16 19:42:32 UTC
Red Hat Product Errata RHBA-2026:8613 0 None None None 2026-04-16 22:25:07 UTC
Red Hat Product Errata RHBA-2026:8614 0 None None None 2026-04-16 22:34:26 UTC
Red Hat Product Errata RHBA-2026:8615 0 None None None 2026-04-16 22:31:04 UTC
Red Hat Product Errata RHBA-2026:8844 0 None None None 2026-04-20 01:23:51 UTC
Red Hat Product Errata RHBA-2026:8846 0 None None None 2026-04-20 02:06:36 UTC
Red Hat Product Errata RHBA-2026:8955 0 None None None 2026-04-20 11:32:25 UTC
Red Hat Product Errata RHBA-2026:8957 0 None None None 2026-04-20 11:40:36 UTC
Red Hat Product Errata RHBA-2026:8958 0 None None None 2026-04-20 13:05:05 UTC
Red Hat Product Errata RHBA-2026:8959 0 None None None 2026-04-20 11:38:20 UTC
Red Hat Product Errata RHBA-2026:9485 0 None None None 2026-04-21 20:04:53 UTC
Red Hat Product Errata RHBA-2026:9486 0 None None None 2026-04-21 19:34:43 UTC
Red Hat Product Errata RHBA-2026:9802 0 None None None 2026-04-22 17:05:42 UTC
Red Hat Product Errata RHSA-2026:10097 0 None None None 2026-04-30 12:10:57 UTC
Red Hat Product Errata RHSA-2026:12274 0 None None None 2026-05-08 20:57:05 UTC
Red Hat Product Errata RHSA-2026:13812 0 None None None 2026-05-05 17:49:49 UTC
Red Hat Product Errata RHSA-2026:8492 0 None None None 2026-04-16 14:47:34 UTC
Red Hat Product Errata RHSA-2026:8510 0 None None None 2026-04-16 16:09:58 UTC
Red Hat Product Errata RHSA-2026:8517 0 None None None 2026-04-16 16:40:24 UTC
Red Hat Product Errata RHSA-2026:8521 0 None None None 2026-04-16 16:43:51 UTC
Red Hat Product Errata RHSA-2026:8534 0 None None None 2026-04-16 18:12:19 UTC
Red Hat Product Errata RHSA-2026:8864 0 None None None 2026-04-20 02:48:45 UTC
Red Hat Product Errata RHSA-2026:8865 0 None None None 2026-04-20 02:49:49 UTC
Red Hat Product Errata RHSA-2026:8866 0 None None None 2026-04-20 03:55:07 UTC
Red Hat Product Errata RHSA-2026:8867 0 None None None 2026-04-20 02:15:21 UTC
Red Hat Product Errata RHSA-2026:8873 0 None None None 2026-04-20 03:43:24 UTC
Red Hat Product Errata RHSA-2026:8908 0 None None None 2026-04-20 05:15:53 UTC
Red Hat Product Errata RHSA-2026:9026 0 None None None 2026-04-20 13:04:19 UTC
Red Hat Product Errata RHSA-2026:9592 0 None None None 2026-04-22 05:59:42 UTC

Description OSIDB Bzimport 2026-03-19 12:25:44 UTC 
A Heap Out-of-Bounds Read vulnerability exists in the RAR archive processing logic of the libarchive library. The issue arises from improper validation of the LZSS sliding window size after transitions between compression methods (PPMd and LZSS). Due to a mismatch between the allocated buffer size and the expected dictionary size, the copy_from_lzss_window() function performs out-of-bounds memory reads. This allows a specially crafted RAR archive to leak heap memory through the archive_read_data() API before integrity checks (CRC) are enforced. The vulnerability can be exploited remotely without authentication or user interaction in systems that automatically process archives, leading to disclosure of sensitive information.
Comment 2 errata-xmlrpc 2026-04-16 14:47:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:8492 https://access.redhat.com/errata/RHSA-2026:8492
Comment 3 errata-xmlrpc 2026-04-16 16:09:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:8510 https://access.redhat.com/errata/RHSA-2026:8510
Comment 4 errata-xmlrpc 2026-04-16 16:40:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:8517 https://access.redhat.com/errata/RHSA-2026:8517
Comment 5 errata-xmlrpc 2026-04-16 16:43:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:8521 https://access.redhat.com/errata/RHSA-2026:8521
Comment 6 errata-xmlrpc 2026-04-16 18:12:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:8534 https://access.redhat.com/errata/RHSA-2026:8534
Comment 7 errata-xmlrpc 2026-04-20 02:15:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:8867 https://access.redhat.com/errata/RHSA-2026:8867
Comment 8 errata-xmlrpc 2026-04-20 02:48:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:8864 https://access.redhat.com/errata/RHSA-2026:8864
Comment 9 errata-xmlrpc 2026-04-20 02:49:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:8865 https://access.redhat.com/errata/RHSA-2026:8865
Comment 10 errata-xmlrpc 2026-04-20 03:43:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:8873 https://access.redhat.com/errata/RHSA-2026:8873
Comment 11 errata-xmlrpc 2026-04-20 03:55:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:8866 https://access.redhat.com/errata/RHSA-2026:8866
Comment 12 errata-xmlrpc 2026-04-20 05:15:52 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-2026:8908 https://access.redhat.com/errata/RHSA-2026:8908
Comment 13 errata-xmlrpc 2026-04-20 13:04:18 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-2026:9026 https://access.redhat.com/errata/RHSA-2026:9026
Comment 14 errata-xmlrpc 2026-04-22 05:59:41 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-2026:9592 https://access.redhat.com/errata/RHSA-2026:9592
Comment 15 errata-xmlrpc 2026-04-30 12:10:56 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.16

Via RHSA-2026:10097 https://access.redhat.com/errata/RHSA-2026:10097
Comment 18 errata-xmlrpc 2026-05-05 17:49:48 UTC 
This issue has been addressed in the following products:

  RHEL-8 based Middleware Containers

Via RHSA-2026:13812 https://access.redhat.com/errata/RHSA-2026:13812
Comment 22 errata-xmlrpc 2026-05-08 20:57:04 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.12

Via RHSA-2026:12274 https://access.redhat.com/errata/RHSA-2026:12274
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