A flaw was found in BusyBox. When resuming a download over File Transfer Protocol (FTP), the wget utility fails to verify that the resume offset does not exceed the file size reported by the server, resulting in an integer calculation error. A malicious FTP server or an on-path network attacker can exploit this issue by returning crafted file size metadata, triggering a heap-based buffer overflow with attacker-controlled data. Successful exploitation may allow an attacker to execute arbitrary code or crash the application, resulting in a denial of service (DoS).
Advisories

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Fixes

Solution

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Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Tue, 10 Nov 2026 13:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in BusyBox. When resuming a download over File Transfer Protocol (FTP), the wget utility fails to verify that the resume offset does not exceed the file size reported by the server, resulting in an integer calculation error. A malicious FTP server or an on-path network attacker can exploit this issue by returning crafted file size metadata, triggering a heap-based buffer overflow with attacker-controlled data. Successful exploitation may allow an attacker to execute arbitrary code or crash the application, resulting in a denial of service (DoS).
Title Busybox: heap buffer overflow in wget ftp resume when the resume offset exceeds the reported file size
First Time appeared Redhat
Redhat hummingbird
Redhat rhel Els
Weaknesses CWE-787
CPEs cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:rhel_els:6
Vendors & Products Redhat
Redhat hummingbird
Redhat rhel Els
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-11-10T13:03:02.493Z

Reserved: 2026-11-09T11:36:29.479Z

Link: CVE-2026-124747

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-10T13:18:22.343

Modified: 2026-11-10T13:18:22.487

Link: CVE-2026-124747

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses