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Affected Component
Analysis
libarchive
Patched
Name
CVE-2026-4424
Description
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.
CWEs
Published Date
Updated Date
Workaround
-
Advisories
https://access.redhat.com/errata/RHSA-2026:10065Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:10097Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:11768Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8492Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8510Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8517Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8521Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8534Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8864Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8865Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8866Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8867Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8873Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8908Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8944Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9026Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9592Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9832Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-4424Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2449006Issue Tracking
https://github.com/libarchive/libarchive/pull/2898Issue Tracking
Analysis#
Vulnerability Ratings#
7.5
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
libarchive (yocto:scarthgap)
#
Title
Author
Resolve
1
Fix -Wsign-compare: cast mask+1 to unsigned int
elhananhaenel <elhanan.haenel@mail.huji.ac.il>
CVE-2026-4424
2
rar: fix LZSS window size mismatch after PPMd block
elhananhaenel <elhanan.haenel@mail.huji.ac.il>
CVE-2026-4424