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Vulnerability · Published Mar 13, 2026 · Assigned by redhat

CVE-2026-4111Libarchive: infinite loop denial of service in rar5 decompression via archive_read_data() in libarchive

High 7.5

In plain English

A high-severity infinite loop in Cert Manager support for Red Hat OpenShift release 1.18 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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 45.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter a state where internal logic prevents forward progress. This condition results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum validation and appears structurally valid, affected applications cannot detect the issue before processing. This can allow attackers to cause persistent denial-of-service conditions in services that automatically process archives.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10bsdtar3.7.7-5.el10_1ALSA-2026:5063
AlmaLinux:9bsdtar3.5.3-7.el9_7ALSA-2026:5080
AlmaLinux:10libarchive3.7.7-5.el10_1ALSA-2026:5063
AlmaLinux:9libarchive3.5.3-7.el9_7ALSA-2026:5080
AlmaLinux:10libarchive-devel3.7.7-5.el10_1ALSA-2026:5063
AlmaLinux:9libarchive-devel3.5.3-7.el9_7ALSA-2026:5080
Debian:12libarchive3.6.2-1+deb12u4DEBIAN-CVE-2026-4111
Debian:13libarchive3.7.4-4+deb13u1DEBIAN-CVE-2026-4111
Debian:14libarchive3.8.6-1DEBIAN-CVE-2026-4111
Rocky Linux:10libarchive0:3.7.7-5.el10_1RLSA-2026:5063
Rocky Linux:9libarchive0:3.5.3-7.el9_7RLSA-2026:5080
Ubuntu:22.04:LTSlibarchive3.6.0-1ubuntu1.6UBUNTU-CVE-2026-4111
Ubuntu:24.04:LTSlibarchive3.7.2-2ubuntu0.6UBUNTU-CVE-2026-4111
Ubuntu:25.10libarchive3.7.7-0ubuntu3.1UBUNTU-CVE-2026-4111

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 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 4.13 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 Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references
Red Hat Red Hat AI Inference Server 3.2 see references
Red Hat Red Hat AI Inference Server 3.2 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat Discovery 2 see references
Red Hat Red Hat Discovery 2 see references

Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References