Libarchive: infinite loop denial of service in rar5 decompression via archive_read_data() in libarchive
CVSS score
7.5
EPSS probability
%0.7
Risk score
0.1
Published
7 mo ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-4111 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-4111 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Enterprise Linux 10 | View |
| 2 | Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | View |
| 3 | Red Hat | Red Hat Enterprise Linux 9 | View |
| 4 | Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | View |
| 5 | Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | View |
| 6 | Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | View |
| 7 | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | View |
| 8 | Red Hat | Red Hat OpenShift Container Platform 4.13 | View |
| 9 | Red Hat | Red Hat OpenShift Container Platform 4.14 | View |
| 10 | Red Hat | Red Hat OpenShift Container Platform 4.15 | View |
| 11 | Red Hat | Red Hat OpenShift Container Platform 4.16 | View |
| 12 | Red Hat | Red Hat OpenShift Container Platform 4.17 | View |
| 13 | Red Hat | Red Hat OpenShift Container Platform 4.18 | View |
| 14 | Red Hat | Red Hat OpenShift Container Platform 4.19 | View |
| 15 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 16 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 17 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 18 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 19 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | View |
| 20 | Red Hat | Red Hat AI Inference Server 3.2 | View |
| 21 | Red Hat | Red Hat AI Inference Server 3.2 | View |
| 22 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 23 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 24 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 25 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 26 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 27 | Red Hat | Red Hat AI Inference Server 3.3 | View |
| 28 | Red Hat | Red Hat Discovery 2 | View |
| 29 | Red Hat | Red Hat Discovery 2 | View |
| 30 | Red Hat | Red Hat Hardened Images | View |
| 31 | Red Hat | Red Hat Insights proxy 1.5 | View |
| 32 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 33 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 34 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 35 | Red Hat | Red Hat Update Infrastructure 5 | View |
| 36 | Red Hat | Red Hat Enterprise Linux 6 | View |
| 37 | Red Hat | Red Hat Enterprise Linux 7 | View |
| 38 | Red Hat | Red Hat Enterprise Linux 8 | View |
| 39 | Red Hat | Red Hat OpenShift Container Platform 4 | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.5 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD |
| 7.5 | CVSS 3.x | — | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | Microsoft MSRC |
| 7.5 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVE CNA |
| 7.5 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVE ADP |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-4111 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-2026-4111 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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