Vulnerability in BusyBox Affects Volume Identification
CVE-2026-124742

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 6
Red Hat Hardened Images
Vendor
CVE Published:
11 November 2026

What is CVE-2026-124742?

A defect in BusyBox's volume identification mechanism allows for improper validation of cluster parameters when processing specially crafted FAT filesystem images. An attacker can exploit this vulnerability by delivering a malicious storage device or disk image, triggering a divide-by-zero condition during the partition scanning phase. This flaw leads to unexpected crashes of probing utilities, causing a Denial of Service that disrupts crucial device discovery processes and can severely affect system boot operations.

References

https://access.redhat.com/security/cve/CVE-2026-124742
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2571620
issue-trackingx_refsource_REDHAT
https://github.com/vda-linux/busybox_mirror/commit/b7c89c4

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank ducanhluu for reporting this issue.
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