CVE-2026-4424
Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing
CVSS Score
7.5
EPSS Score
0.2%
EPSS Percentile
38th
A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.
| CWE | CWE-125 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Mar 19, 2026 |
| Last Updated | Apr 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Hardened Images
All versions affected Red Hat / Red Hat OpenShift Container Platform 4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8492 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8510 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8517 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8521 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8534 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-4424 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2449006 github.com: https://github.com/libarchive/libarchive/pull/2898
Credits
Red Hat would like to thank Elhanan Haenel for reporting this issue.