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Findings

CVE-2026-4111

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

Published Mar 13, 2026 · updated Oct 14, 2026 · Red Hat Red Hat Enterprise Linux 10

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.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 13, 2026 · Catalog

    Detected

    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 p

  2. Oct 14, 2026 · Catalog

    Updated

    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 p

Affected

  • vendor Red Hat Red Hat Enterprise Linux 10version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 10.0 Extended Update Supportversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutionsversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9.4 Extended Update Supportversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9.6 Extended Update Supportversion unspecified

Sources

  • CIRCL Vulnerability LookupCVE-2026-4111

    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 forw

    vulnerability.circl.lu

References