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7.5
HIGH CVSS 3.1
CVE-2026-4424
Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing
Overview
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.

Details
INFO

Published Date :

March 19, 2026, 3:16 p.m.

Last Modified :

May 20, 2026, 5:16 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-4424 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
2 Redhat enterprise_linux_server_aus
3 Redhat openshift_container_platform
4 Redhat keycloak
5 Redhat openshift_container_platform_for_power
6 Redhat openshift_container_platform_for_arm64
7 Redhat hardened_images
1 Gnu emacs
2 Gnu grub2
1 Libarchive libarchive
1 Gnome libsoup
1 Gitoxidelabs gix-date
1 Ubuntu libefiboot
: Total Affected Vendor : 6 | Products : 13
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 53f830b8-0a3f-465b-8143-3b8a9948e749
CVSS 3.1 HIGH [email protected]
Solution
Update libarchive to patch heap out-of-bounds read in RAR processing.
  • Update libarchive to the latest version.
  • Apply vendor patches for libarchive.
  • Validate RAR archive processing logic.
  • Restrict processing of untrusted archives.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-4424.

URL Resource
https://access.redhat.com/errata/RHSA-2026:10065 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:10097 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:11768 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:12071
https://access.redhat.com/errata/RHSA-2026:12274
https://access.redhat.com/errata/RHSA-2026:13812
https://access.redhat.com/errata/RHSA-2026:14773
https://access.redhat.com/errata/RHSA-2026:14937
https://access.redhat.com/errata/RHSA-2026:15087
https://access.redhat.com/errata/RHSA-2026:16008
https://access.redhat.com/errata/RHSA-2026:16009
https://access.redhat.com/errata/RHSA-2026:16030
https://access.redhat.com/errata/RHSA-2026:16174
https://access.redhat.com/errata/RHSA-2026:17596
https://access.redhat.com/errata/RHSA-2026:19725
https://access.redhat.com/errata/RHSA-2026:8492 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8510 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8517 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8521 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8534 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8864 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8865 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8866 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8867 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8873 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8908 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:8944 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9026 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9592 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:9832 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-4424 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2449006 Issue Tracking Third Party Advisory
https://github.com/libarchive/libarchive/pull/2898 Issue Tracking Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-4424 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-4424 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-4424 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-4424 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:17596
    Added Reference https://access.redhat.com/errata/RHSA-2026:19725
  • CVE Modified by [email protected]

    May. 14, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:16008
    Added Reference https://access.redhat.com/errata/RHSA-2026:16009
    Added Reference https://access.redhat.com/errata/RHSA-2026:16030
  • CVE Modified by [email protected]

    May. 13, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:14773
  • CVE Modified by [email protected]

    May. 13, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:15087
  • CVE Modified by [email protected]

    May. 12, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:16174
  • CVE Modified by [email protected]

    May. 11, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:12071
  • CVE Modified by [email protected]

    May. 09, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:12274
  • CVE Modified by [email protected]

    May. 07, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:14937
  • CVE Modified by [email protected]

    May. 05, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:13812
  • Initial Analysis by [email protected]

    Apr. 30, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.16:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform_for_arm64:4.16:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform_for_power:4.16:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:* *cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:10065 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:10097 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:11768 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8492 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8510 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8517 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8521 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8534 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8864 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8865 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8866 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8867 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8873 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8908 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:8944 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:9026 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:9592 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/errata/RHSA-2026:9832 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-4424 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2449006 Types: Issue Tracking, Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://github.com/libarchive/libarchive/pull/2898 Types: Issue Tracking, Third Party Advisory
  • CVE Modified by [email protected]

    Apr. 30, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:10097
  • CVE Modified by [email protected]

    Apr. 29, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:11768
  • CVE Modified by [email protected]

    Apr. 23, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:10065
  • CVE Modified by [email protected]

    Apr. 22, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8944
  • CVE Modified by [email protected]

    Apr. 22, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:9832
  • CVE Modified by [email protected]

    Apr. 22, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:9592
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:9026
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8866
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8908
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8873
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8864
    Added Reference https://access.redhat.com/errata/RHSA-2026:8865
  • CVE Modified by [email protected]

    Apr. 20, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8867
  • CVE Modified by [email protected]

    Apr. 16, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8517
    Added Reference https://access.redhat.com/errata/RHSA-2026:8521
  • CVE Modified by [email protected]

    Apr. 16, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8534
  • CVE Modified by [email protected]

    Apr. 16, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8510
  • CVE Modified by [email protected]

    Apr. 16, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:8492
  • New CVE Received by [email protected]

    Mar. 19, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Added CWE CWE-125
    Added Reference https://access.redhat.com/security/cve/CVE-2026-4424
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2449006
    Added Reference https://github.com/libarchive/libarchive/pull/2898
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact