CVE-2026-26158 (GCVE-0-2026-26158)

Vulnerability from cvelistv5 – Published: 2026-02-11 20:27 – Updated: 2026-11-04 22:15
VLAI
Title
Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries
Summary
A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-12 04:55 UTC
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
redhat CNA
References
Impacted products
Vendor Product Version
Red Hat Red Hat Hardened Images Unaffected: 1.37.0-7.2.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:rhel_els:6
Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V4.0 (custom)
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
Date Public
2026-02-11 00:00
Credits
Red Hat would like to thank Calil Khalil (Hakal) for reporting this issue.
Show details on NVD website
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              "value": "As a prevention measure, avoid extracting tar archives from untrusted sources using BusyBox, especially when operating with elevated privileges. If processing untrusted archives is unavoidable, ensure that the extraction process is performed within a strictly sandboxed environment with minimal permissions. This operational control reduces the risk of arbitrary file modification and privilege escalation."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-73: External Control of File Name or Path"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2026-26158",
        "datePublished": "2026-02-11T20:27:06.979Z",
        "dateReserved": "2026-02-11T17:05:41.991Z",
        "dateUpdated": "2026-11-04T22:15:35.293Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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