CVE-2026-14164 (High) detected in libarchivev3.8.5

[mend-bolt-for-github]

CVE-2026-14164 - High Severity Vulnerability

Vulnerable Library - libarchivev3.8.5

Multi-format archive and compression library

Library home page: https://github.com/libarchive/libarchive.git

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/contrib/libarchive/libarchive/archive_read_support_format_rar5.c

Vulnerability Details

A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

Publish Date: 2026-06-30

URL: CVE-2026-14164

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-06-30

Fix Resolution: https://github.com/libarchive/libarchive.git - v3.8.8

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