CVE-2026-4111

Libarchive: infinite loop denial of service in rar5 decompression via archive_read_data() in libarchive

State: Published
Severity: 7.5 High
Published: Mar 13, 2026
Updated: Oct 14, 2026
Reserved: Mar 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat-SADP

Weaknesses

CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:3.7.7-5.el10_1 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:3.7.7-5.el10_0 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:3.5.3-7.el9_7 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:3.5.3-7.el9_7 and laterNot affected
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat	0:3.5.3-2.el9_0.3 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:3.5.3-5.el9_2.1 and laterNot affected
Red Hat Enterprise Linux 9.4 Extended Update SupportRed Hat	0:3.5.3-4.el9_4.2 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:3.5.3-6.el9_6.1 and laterNot affected
Red Hat OpenShift Container Platform 4.13Red Hat	413.92.202604080111-0 and laterNot affected
Red Hat OpenShift Container Platform 4.14Red Hat	414.92.202605060243-0 and laterNot affected
Red Hat OpenShift Container Platform 4.15Red Hat	415.92.202605060220-0 and laterNot affected
Red Hat OpenShift Container Platform 4.16Red Hat	416.94.202604211449-0 and laterNot affected
Red Hat OpenShift Container Platform 4.17Red Hat	417.94.202605112123-0 and laterNot affected
Red Hat OpenShift Container Platform 4.18Red Hat	418.94.202604140044-0 and laterNot affected
Red Hat OpenShift Container Platform 4.19Red Hat	4.19.9.6.202604211219-0 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459707 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459711 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791459759 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1789029076 and laterNot affected
Cert Manager support for Red Hat OpenShift release 1.18Red Hat	1791966259 and laterNot affected
Red Hat AI Inference Server 3.2Red Hat	1780681984 and laterNot affected
Red Hat AI Inference Server 3.2Red Hat	1775740563 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1778244559 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1778244531 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1778244546 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1775680192 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1775680262 and laterNot affected
Red Hat AI Inference Server 3.3Red Hat	1775749857 and laterNot affected
Red Hat Discovery 2Red Hat	1775668717 and laterNot affected
Red Hat Discovery 2Red Hat	1775675922 and laterNot affected
Red Hat Hardened ImagesRed Hat	3.8.7-1.hum1 and laterNot affected
Red Hat Insights proxy 1.5Red Hat	1776868961 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1776868774 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1776868744 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1776868772 and laterNot affected
Red Hat Update Infrastructure 5Red Hat	1776868842 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:10065vendor-advisory
RHSA-2026:10081vendor-advisory
RHSA-2026:10097vendor-advisory
RHSA-2026:14773vendor-advisory
RHSA-2026:15087vendor-advisory
RHSA-2026:16008vendor-advisory
RHSA-2026:16009vendor-advisory
RHSA-2026:16174vendor-advisory
RHSA-2026:17596vendor-advisory
RHSA-2026:25096vendor-advisory
RHSA-2026:5063vendor-advisory
RHSA-2026:5080vendor-advisory
RHSA-2026:6647vendor-advisory
RHSA-2026:7093vendor-advisory
RHSA-2026:7105vendor-advisory
RHSA-2026:7106vendor-advisory
RHSA-2026:7239vendor-advisory
RHSA-2026:7329vendor-advisory
RHSA-2026:7335vendor-advisory
RHSA-2026:82347vendor-advisory
RHSA-2026:82354vendor-advisory
RHSA-2026:82372vendor-advisory
RHSA-2026:82857vendor-advisory
RHSA-2026:8423vendor-advisory
RHSA-2026:8746vendor-advisory
RHSA-2026:8747vendor-advisory
RHSA-2026:8748vendor-advisory
RHSA-2026:8865vendor-advisory
RHSA-2026:8944vendor-advisory
RHSA-2026:9832vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-4111vdb-entry
RHBZ#2446453issue-tracking
https://github.com/libarchive/libarchive/pull/2877
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4111.json

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.