BusyBox HFS+ Volume ID DoS via Header Validation
CVE-2026-124743 Published on November 11, 2026
Busybox: divide-by-zero and heap over-read in the volume_id hfs+ prober
A flaw was found in BusyBox. When processing filesystem metadata, the volume identification component does not properly validate header values in HFS+ filesystems. An attacker able to attach a storage device or supply a specially crafted filesystem image can trigger an application crash, resulting in a Denial of Service (DoS) and preventing device resolution.
Vulnerability Analysis
CVE-2026-124743 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Timeline
Reported to Red Hat.
Made public. 17 days later.
Weakness Type
Divide By Zero
The product divides a value by zero. This weakness typically occurs when an unexpected value is provided to the product, or if an error occurs that is not properly detected. It frequently occurs in calculations involving physical dimensions such as size, length, width, and height.
Products Associated with CVE-2026-124743
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