Log in Start free

Vulnerability · Published Mar 19, 2026 · Assigned by redhat

CVE-2026-4424Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing

High 7.5

In plain English

A high-severity out-of-bounds read in Cert Manager support for Red Hat OpenShift release 1.17 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.3%top 29.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10bsdtar3.7.7-8.el10_1ALSA-2026:8492
AlmaLinux:8bsdtar3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9bsdtar3.5.3-9.el9_7ALSA-2026:8510
AlmaLinux:10libarchive3.7.7-8.el10_1ALSA-2026:8492
AlmaLinux:8libarchive3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9libarchive3.5.3-9.el9_7ALSA-2026:8510
AlmaLinux:10libarchive-devel3.7.7-8.el10_1ALSA-2026:8492
AlmaLinux:8libarchive-devel3.3.3-7.el8_10ALSA-2026:8534
AlmaLinux:9libarchive-devel3.5.3-9.el9_7ALSA-2026:8510
Debian:12libarchive3.6.2-1+deb12u4DEBIAN-CVE-2026-4424
Debian:13libarchive3.7.4-4+deb13u1DEBIAN-CVE-2026-4424
Debian:14libarchive3.8.7-1DEBIAN-CVE-2026-4424
Rocky Linux:10libarchive0:3.7.7-8.el10_1RLSA-2026:8492
Rocky Linux:8libarchive0:3.3.3-7.el8_10RLSA-2026:8534
Rocky Linux:9libarchive0:3.5.3-9.el9_7RLSA-2026:8510
Ubuntu:22.04:LTSlibarchive3.6.0-1ubuntu1.7UBUNTU-CVE-2026-4424
Ubuntu:22.04:LTSlibarchive3.6.0-1ubuntu1.7USN-8292-1
Ubuntu:24.04:LTSlibarchive3.7.2-2ubuntu0.7UBUNTU-CVE-2026-4424
Ubuntu:24.04:LTSlibarchive3.7.2-2ubuntu0.7USN-8292-1
Ubuntu:25.10libarchive3.7.7-0ubuntu3.2USN-8292-1
Ubuntu:25.10libarchive3.7.7-0ubuntu3.2UBUNTU-CVE-2026-4424
Ubuntu:26.04:LTSlibarchive3.8.5-1ubuntu2.1UBUNTU-CVE-2026-4424
Ubuntu:26.04:LTSlibarchive3.8.5-1ubuntu2.1USN-8292-1

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Container Platform 4.12 see references
Red Hat Red Hat OpenShift Container Platform 4.13 see references
Red Hat Red Hat OpenShift Container Platform 4.14 see references
Red Hat Red Hat OpenShift Container Platform 4.15 see references
Red Hat Red Hat OpenShift Container Platform 4.16 see references
Red Hat Red Hat OpenShift Container Platform 4.17 see references
Red Hat Red Hat OpenShift Container Platform 4.18 see references
Red Hat Red Hat OpenShift Container Platform 4.19 see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References