Buffer Access with Incorrect Length Value Affecting libarchive package, versions <3.8.5-1ubuntu2.2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.2% (11th percentile)

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  • Snyk IDSNYK-UBUNTU2604-LIBARCHIVE-17940497
  • published21 Jul 2026
  • disclosed10 Jul 2026

Introduced: 10 Jul 2026

CVE-2026-15028  (opens in a new tab)
CWE-805  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 libarchive to version 3.8.5-1ubuntu2.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libarchive package and not the libarchive package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

A flaw was found in libarchive. This vulnerability allows a remote attacker to trigger a heap overflow by providing a specially crafted tar archive. The issue occurs during the parsing of a PAX extended header containing a malformed SUN.holesdata sparse-file attribute. Successful exploitation could lead to a denial of service, making the system unavailable, or potentially allow for arbitrary code execution, giving the attacker control over the affected system.

CVSS Base Scores

version 3.1