Vulnerability Details CVE-2026-4424
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 52.8%
CVSS Severity
CVSS v3 Score 7.5
References
- https://access.redhat.com/errata/RHSA-2026:10065
- https://access.redhat.com/errata/RHSA-2026:10097
- https://access.redhat.com/errata/RHSA-2026:11768
- https://access.redhat.com/errata/RHSA-2026:8492
- https://access.redhat.com/errata/RHSA-2026:8510
- https://access.redhat.com/errata/RHSA-2026:8517
- https://access.redhat.com/errata/RHSA-2026:8521
- https://access.redhat.com/errata/RHSA-2026:8534
- https://access.redhat.com/errata/RHSA-2026:8864
- https://access.redhat.com/errata/RHSA-2026:8865
- https://access.redhat.com/errata/RHSA-2026:8866
- https://access.redhat.com/errata/RHSA-2026:8867
- https://access.redhat.com/errata/RHSA-2026:8873
- https://access.redhat.com/errata/RHSA-2026:8908
- https://access.redhat.com/errata/RHSA-2026:8944
- https://access.redhat.com/errata/RHSA-2026:9026
- https://access.redhat.com/errata/RHSA-2026:9592
- https://access.redhat.com/errata/RHSA-2026:9832
- https://access.redhat.com/security/cve/CVE-2026-4424
- https://bugzilla.redhat.com/show_bug.cgi?id=2449006
- https://github.com/libarchive/libarchive/pull/2898