CVE-2026-5121 Affecting bsdtar package, versions <0:3.1.2-14.0.3.el7_9


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
1.43% (72nd percentile)

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  • Snyk IDSNYK-ORACLE7-BSDTAR-18616235
  • published11 Aug 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

CVE-2026-5121  (opens in a new tab)

How to fix?

Upgrade Oracle:7 bsdtar to version 0:3.1.2-14.0.3.el7_9 or higher.
This issue was patched in ELSA-2026-8517.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bsdtar package and not the bsdtar package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.

References

CVSS Base Scores

version 3.1